Submitted by brad on Thu, 2011-10-27 11:28.
I’m just back from the “ITS World Congress” an annual meeting of people working on “Intelligent Transportation Systems” which means all sorts of applications of computers and networking to transportation, particularly cars. A whole bunch of stuff gets covered there, including traffic monitoring and management, toll collection, transit operations etc. but what’s of interest to robocar enthusiasts is what goes into cars and streets. People started networking cars with systems like OnStar, now known in the generic sense as “telematics” but things have grown since then.
The big effort involves putting digital radios into cars. The radio system, known by names like 802.11p, WAVE and DSRC involves an 802.11 derived protocol in a new dedicated band at 5.9ghz. The goal is a protocol suitable for safety applications, with super-fast connections and reliable data. Once the radios in the car, the car will be able to use it to talk to other cars (known as V2V) or to infrastructure facilities such as traffic lights (known as V2I.) The initial planned figured that the V2I services would give you internet in your car, but the reality is that 4G cellular networks have taken over that part of the value chain.
Coming up with value for V2V is a tricky proposition. Since you can only talk to cars very close to you, it’s not a reliable way to talk with any particular car. Relaying through the wide area network is best for that unless you need lots of bandwidth or really low latency. There’s not much that needs lots of bandwidth, but safety applications do demand both low latency and a robust system that doesn’t depend on infrastructure.
The current approach to safety applications is to have equipped cars transmit status information. Formerly called a “here I am” this is a broadcast of location, direction, speed and signals like brake lights, turn signals etc. If somebody else’s car is transmitting that, your car can detect their presence, even if you can’t see them. This lets your car detect and warn about things like:
- The car 2 or 3 in front of you, hidden by the truck in front of you, that has hit the brakes or stalled
- People in your blind spot, or who are coming up on you really fast when your’re about to change lanes
- Hidden cars coming up when you want to turn left, or want to pass on a rural highway
- Cars about to run red lights or blow stop signs at an intersection you’re about to go through
- Privacy is a big issue. The boxes change their ID every minute so you can’t track a car over a long distance unless you can follow it over every segment, but is that enough? They say a law is needed so the police don’t use the speed broadcast to ticket you, but will it stay that way?
It turns out that intersection collisions are a large fraction of crashes, so there’s a big win there, if you can do it. The problem is one of critical mass. Installed in just a few cars, such a system is extremely unlikely to provide aid. For things like blindspot detection, existing systems that use cameras or radars are far better because they see all cars, not just those with radios. Even with 10% penetration, there’s only a 1% chance any given collision could be prevented with the system, though it’s a 10% chance for the people who seek out the system. (Sadly, those who seek out fancy safety systems are probably less likely to be the ones blowing through red lights, and indeed another feature of the system — getting data from traffic lights — already can do a lot to stop an equipped car from going through a red light by mistake.) read more »
Submitted by brad on Tue, 2011-06-28 20:45.
The latest JD Power survey on car satisfaction has a very new complaint that has now the second most annoying item to new car owners namely problems with the voice recognition system in their hands-free interface. This is not too surprising, since voice recognition, especially in cars, is often dreadful. It also reveals that most new tech has lots of UI problems — not every product is the iPod, lauded from the start for its UI.
But one interesting realization in the study is that users have become frustrated at having too many devices with too many UIs. Their car (which now has a touchpad and lots of computer features) uses a different UI from their phone and computer and tablet and whatever. Even if the car has a superb UI, the problem is that it is different, something new to learn and remember.
One might fix this by having the same platform, be it iOS or Android on several of the devices, but that’s a tall order. Car vendors do not want to make a phone one one platform and tick off people used to the other platform.
The answer lies in something the car makers don’t like: Don’t put much of their own smarts in the car at all, and expect the user to slot their own mobile phone or tablet into the car. This might be done with something like Nokia’s “Terminal Mode” where the car’s screen and buttons can be taken over by the phone, or by not having a screen in the car at all, just a standard mounting place.
Some time ago I wrote that cars should stop coming with included radios as they used to 30 years ago, and let the slot in the dashboard where the radio and electronics go become a center for innovation. In particular innovation at the speed of consumer and mobile devices, not innovation at the speed of car companies. But there are too many pressures to stop this from happening. Car companies get to charge a lot for fancy radio and electronics systems in the cars, and they like this. And they like the control over the whole experience. But as they get more complaints they may realize that it’s not the right thing for them to be building. Especially not when the car (and the in-dash system) last for 10 to 15 years, while most consumer electronic devices are obsolete in 1-2 years.
There aren’t that many makes of cars, nor so many mobile platforms, so making custom apps for the car and the mobile platform isn’t that hard. In fact, I would expect you would see lots of competing aftermarket ones if they opened up the market to it. And open source ones too, built by fans of the particular cars.
Submitted by brad on Sun, 2011-05-01 19:27.
It’s very common to use mobile phones for driving activities today. Many people even put in cell phone holders in their cars when they want to use the phones as navigation systems as well as make calls over a bluetooth. There’s even evidence that dashboard mounting reduces the distracted driving phenomenon associated with phones in cars.
Nokia and others are pushing one alternative for the cars that have dashboard screens. This is called “Terminal Mode” and is a protocol so the phone can make use of the display, buttons and touchscreens in the car. Putting the smarts in the phone and making the dash be the dumb peripheral is the right idea, since people upgrade phones frequently and cars not nearly so much. The terminal mode interface can be wireless so the phone does not have to be plugged in, though of course most people like to recharge phones while driving.
Terminal mode will be great if it comes, but it would be good to also push for a standard port on dashboards for mounting mobile phones. Today, most mobile phone holders either stick to the windshield with a suction cup, or clamp onto the vents of the air conditioner. A small port or perhaps flip out lever arm would be handy if standardized on dashboards. The lever arm would offer a standard interface for connecting a specific holder for the specific device. In addition, the port would offer USB wiring so that the holder could offer it to the phone. This would offer power at the very least but could also do data for terminal mode and some interfacing with other elements of the car, including the stereo system, or the onboard-diagnostics bus. Access to other screens in the back (for playing video) and to superior antennas might make sense. While many phones use their USB port to be a peripheral to a PC, some have “USB to go” which allows a device to be either master or peripheral, allowing more interesting functions.
Even with terminal mode, there could be value in having two screens, and more buttons, though of course apps would have to be developed to understand that. However, one simple thing is that a phone could run two apps at once on two screens (or even two apps at once on the larger screen of the car) which would actually be pretty handy.
Submitted by brad on Sat, 2011-01-29 17:05.
Last year I wrote about an interesting but simple pedal powered monorail/PRT system called Shweeb which had won a prize/investment from Google. Recent announcements show they are not alone in this concept. Scott Olson, the original developer of the Rollerblade, has founded a company called Skyride Technologies to build their own version of a pedal powered suspended monorail.
You will find much that is similar between the two concepts, though they were developed independently. I will have to give Skyride the nod of picking names, though. Skyride offers both pedaling and a rowing-machine style interface, the latter aimed both at the disabled and those seeking a different kind of workout.
At present, the Skyride car is also open to the air, which has both advantages and disadvantages when it comes to cooling, drag, and exposure to the elements. Skyride does not also seem to offer the “bumper” system in the wheel cartridge which Shweeb claims will allow vehicles to safely hit one another and then push one another in trains.
Both are confined to prototype tracks for now, though the Schweeb one is an amusement ride that is open to the public. Both have plans to solve the most important problem in turning this into a real transportation system for campuses or urban areas, namely a switch that lets the vehicle smoothly and safely change tracks. Switching has always been an issue in monorails — not that it can’t be solved, but it’s just a little harder than changing lanes in a car. Rail systems sometimes put the switching in the track (that’s what regular heavy rail does) but that’s not very practical if you are going to have very frequent small vehicles. You want in-vehicle switching but with no risk of derailing.
While this concept is interesting, and even more fun if they can prove it works and then add some automation, I am not sure it will ever become a really big space. Still, having 2 companies will not doubt spur a bit more innovation.
Submitted by brad on Fri, 2011-01-14 20:58.
Every day I get into my car and drive somewhere. My mobile phone has a lot of useful apps for travel, including maps with traffic and a lot more. And I am usually calling them up.
I believe that my phone should notice when I am driving off from somewhere, or about to, and automatically do some things for me. Of course, it could notice this if it ran the GPS all the time, but that’s expensive from a power standpoint, so there are other ways to identify this:
- If the car has bluetooth, the phone usually associates with the car. That’s a dead giveaway, and can at least be a clue to start looking at the GPS.
- Most of my haunts have wireless, and the phone associates with the wireless at my house and all the places I work. So it can notice when it disassociates and again start checking the GPS. To get smart, it might even notice the MAC addresses of wireless networks it can’t see inside the house, but which it does see outside or along my usual routes.
- Of course moving out to the car involves jostling and walking in certain directions (it has a compass.)
Once it thinks it might be in the car, it should go to a mode where my “in the car” apps are easy to get to, in particular the live map of the location with the traffic displayed, or the screen for the nav system. Android has a “car mode” that tries to make it easy to access these apps, and it should enter that mode.
It should also now track me for a while to figure out which way I am going. Depending on which way I head and the time of day, it can probably guess which of my common routes I am going to take. For regular commuters, this should be a no-brainer. This is where I want it to be really smart: Instead of me having to call up the traffic, it should see that I am heading towards a given highway, and then check to see if there are traffic jams along my regular routes. If it sees one, Then it should beep to signal that, and if I turn it on, I should see that traffic jam. This way if I don’t hear it beep, I can feel comfortable that there is light traffic along the route I am taking. (Or that if there is traffic, it’s not traffic I can avoid with alternate routes.)
This is the way I want location based apps to work. I don’t want to have to transmit my location constantly to the cloud, and have the cloud figure out what to do at any given location. That’s privacy invading and uses up power and bandwidth. Instead the phone should have a daemon that detects location “events” that have been programmed into it, and then triggers programs when those events occur. Events include entering and leaving my house or places I work, driving certain roads and so on.
And yes, for tools like shopkick, they can even be entering stores I have registered. And as I blogged at the very beginning of this blog many years ago, we can even have an event for when we enter a store with a bad reputation. The phone can download a database of places and wireless and Bluetooth MACs that should trigger events, and as such the network doesn’t need to know my exact location to make things happen. But most importantly, I don’t want to have to know to ask if there is something important near me, I want the right important things to tell me when I get near them.
Submitted by brad on Sat, 2010-11-20 13:58.
You’re driving down the road. You see another car on the road with you that has a problem. The lights are off and it’s dusk. There is something loose that may break off. There’s something left on the roof or the trunk is not closed — any number of things. How do you tell the driver that they need to stop and check? I’ve tried sometimes and they mostly think you are some sort of crazy, driving to close to them, waving at them, honking or shouting. Perhaps after a few people do it they figure it out.
We have a few signals. Oncoming cars flash lights on and off to warn you your lights are off. (Sometimes they are also warning of a speed trap.) High beams means, “I want to pass and you’re impeding the lane” and while many think that’s rude it’s better than tailgating.
We need a signal for “There is a problem with your car, you should check it out.” This signal should be taught in driving schools, and even be on the driving test. A publicity campaign should educate existing drivers.
One proposal that might make sense is the SCUBA signal for “I have a problem.” This is holding your hand flat, palm down, and wiggling it side to side (ie. rotating your wrist.) Then you point to the source of the problem, like your regulator or whatever. (There are specific SCUBA signals for well known problems, like being low on air, nitrogen narcosis etc.)
For this signal you would waggle the hand and then point at the place on the other person’s car. To those untrained, the signal often mean’s “dicey” or uncertain. Shaking of the head could also strengthen the signal.
Anybody have a better signal to propose?
Submitted by brad on Sun, 2010-10-03 00:53.
There was a bit of a stir when Google last week announced that one of the winners of their 10^100 contest would be Shweeb, a pedal-powered monorail from New Zealand that has elements of PRT. Google will invest $1M in Shweeb to help them build a small system, and if it makes any money on the investment, that will go into transportation related charities.
While I had a preference that Google fund a virtual world for developing and racing robocars I have come to love a number of elements about Shweeb, though it’s not robocars and the PRT community seems to not think it’s PRT. I think it is PRT, in that it’s personal, public and, according to the company, relatively rapid through the use of offline stations and non-stop point to point trips. PRT is an idea from the sixties that makes sense but has tried for almost 50 years to get transit planners to believe in it and build it. A micro-PRT has opened as a Heathrow parking shuttle, but in general transit administrators simply aren’t early adopters. They don’t innovate.
What impresses me about Shweeb is its tremendous simplicity. While it’s unlikely to replace our cars or transit systems, it is simple enough that it can actually be built. Once built, it can serve as a testbed for many of PRT’s concepts, and go through incremental improvements. read more »
Submitted by brad on Wed, 2010-08-04 15:35.
Looking at new electric cars like the Nissan Leaf, we see that to keep costs down, cars with a range of 100 miles are on offer. For certain city cars, particularly in 2-car families, this should be just fine. In my particular situation, being just under 50 miles from San Francisco, this won’t work. It’s much too close to the edge, and trips there would require a full charge, and visits to other stops during the trip or finding parking with charging. Other people are resisting the electrics for lesser reasons, since if you ever do exceed the range it’s probably an 8 hour wait.
An alternative is a serial hybrid like the Chevy Volt. This has 40 miles range but a gasoline generator to provide the rest of the range and no “range anxiety.” Good, but more expensive and harder to maintain because electric cars are much simpler than gasoline cars.
Here’s an alternative: The electric car vendor should cut a deal with car rental services like ZipCar and Hertz. If you’re ever on a round trip where there is range anxiety, tell the car. It will use its computer and internal data connection to locate a suitable rental location that is along your route and has a car for you. It will make all appropriate reservations. Upon arrival, your electric car would transmit a signal to the rental car so that it flashes its lights to guide you and unlocks its doors for you. (The hourly car rental companies all have systems already where a transmitter unlocks the car for you.)
In many cases you would then pause, pull the rental out of its spot and put your electric in that spot. With more advanced robocar technologies, the rental would actually pull out of its spot for you. Zipcar has reserved spots for its vehicles and normally it makes no sense for the renter to have just pulled up in a car and need the spot, but it should work just fine. At Hertz or similar companies another open spot may be available.
Then off you go in your gasoline car. To make things as easy as possible, the negotiated contract should include refill of gasoline at a fair market price rather than the insane inflated price that car rental houses charge. Later come back and swap again. read more »
Submitted by brad on Sat, 2010-04-17 19:32.
I’ve been predicting a great deal of innovation in cars with the arrival of robocars and other automatic driving technologies. But there’s a lot of other computerization and new electronics that will be making its way into cars, and to make that happen, we need to make the car into a platform for innovation, rather than something bought as a walled garden from the car vendor.
In the old days, it was fairly common to get a car without a radio, and to buy the radio of your choice. This happened even in higher end cars. However, the advantages in sound quality and dash integration from a factory-installed radio started to win out, especially with horizontal market Japanese companies who were both good at cars and good at radios.
For real innovation, you want a platform, where aftermarket companies come in and compete. And you want early adopters to be able to replace what they buy whenever they get the whim. We replace our computers and phones far more frequently than our cars and the radios inside them.
To facilitate this, I think the car’s radio and “occupant computer” should be merged, but split into three parts:
- The speakers and power amplifier, which will probably last the life of the car, and be driven with some standard interface such as 7.1 digital audio over optical fiber.
- The “guts” which probably live in the trunk or somewhere else not space constrained, and connect to the other parts
- The “interface” which consists of the dashboard panel and screen, with controls, and any other controls and screens, all wired with a network to the guts.
Ideally the hookup between the interface and the guts is a standardized protocol. I think USB 3.0 can handle it and has the bandwidth to display screens on the dashboard, and on the back of the headrests for rear passenger video. Though if you want to imagine an HDTV for the passengers, its possible that we would add a video protocol (like HDMI) to the USB. But otherwise USB is general enough for everything else that will connect to the guts. USB’s main flaw is its master-slave approach, which means the guts needs to be both a master, for control of various things in the car, and a slave, for when you want to plug your laptop into the car and control elements in the car — and the radio itself.
Of course there should be USB jacks scattered around the car to plug in devices like phones and memory sticks and music players, as well as to power devices up on the dash, down in the armrests, in the trunk, under the hood, at the mirror and right behind the grille.
Finally there need to be some antenna wires. That’s harder to standardize but you can be we need antennas for AM/FM/TV, satellite radio, GPS, cellular bands, and various 802.11 protocols including the new 802.11p. In some cases, however, the right solution is just to run USB 3.0 to places an antenna might go, and then have a receiver or tranceiver with integrated antenna which mounts there. A more general solution is best.
This architecture lets us replace things with the newest and latest stuff, and lets us support new radio protocols which appear. It lets us replace the guts if we have to, and replace the interface panels, or customize them readily to particular cars. read more »
Submitted by brad on Mon, 2010-03-29 15:18.
Back in 2008 I wrote a controversial article about whether green transit was a myth in the USA. Today I updated the main chart in that article based on new releases of the Department of Energy Transportation Energy Fact Book 2009 edition. The car and SUV numbers have stayed roughly the same (at about 3500 BTUs/passenger-mile for the average car under average passenger load.)
- Numbers for buses are now worse at 4300. Source data predates the $4/gallon gas crisis, which probably temporarily improved it.
- Light (capacity) rail numbers are significantly worse — reason unknown. San Jose’s Light rail shows modest improvement to 5300 but the overall average reported at 7600 is more than twice the energy of cars!
- Some light rail systems (See Figure 2.3 in Chapter 2) show ridiculously high numbers. Galveston, Texas shows a light rail that takes 8 times as much energy per passenger as the average SUV. Anybody ridden it and care to explain why its ridership is so low?
- Heavy rail numbers also worsen.
- Strangely, average rail numbers stay the same. This may indicate an error in the data or a change of methodology, because while Amtrak and commuter rail are mildly better than the average, it’s not enough to reconcile the new average numbers for light and heavy rail with the rail average.
- I’ve made a note that the electric trike figure is based on today’s best models. Average electric scooters are still very, very good but only half as good as this.
- I’ve added a figure I found for the East Japan railway system. As expected, this number is very good, twice as good as cars, but suggests an upper bound, as the Japanese are among the best at trains.
- I removed the oil-fueled-agriculture number for cyclists, as that caused more confusion than it was worth.
- There is no trolley bus number this year, so I have put a note on the old one.
- It’s not on the chart, but I am looking into high speed rail. Germany’s ICE reports a number around 1200 BTU/PM. The California HSR project claims they are going to do as well as the German system, which I am skeptical of, since it requires a passenger load of 100M/year, when currently less than 25M fly these routes.
Submitted by brad on Thu, 2009-12-31 13:15.
I just landed on a flight from Toronto to San Francisco. If you were inside the USA you may not have heard about the various crazy rules applied to travel to the USA, or at least not experienced them. While we were away the rules changed every day, and perhaps every hour.
Toronto was hit the hardest because it has the most flights to the USA of any airport in the world (with a few other Canadian airports not far behind.) Due to the busy border, you clear U.S. customs and immigration through their satellite office in Toronto, so your plane lands you at domestic gates in the USA, making connections far easier.
The USA started insisting on intimate pat-downs on all passengers and complete hand screening of all carry-ons. For a while there was even a regulation that passengers would have to sit in their seats with nothing on their laps (not blankets, not books, not computers) for the last hour of the flight. That got reverted to “pilot’s discretion” and in our case there was no talk of this.
The heavy search requirements brought Toronto’s heavy to-USA traffic to a standstill. Even with extra mounties pitching in, there was now way to get all those people through the terminal, so the CATSA brought in a near-ban on carry-ons. You could only carry on items from a short list. Notable things not on the list (ie. banned) included books, kid’s toys, lenses and various items people bring on not because they need them in flight, but because they are essential to their trip, or are fragile.
After a few days of reduced carry-ons, they got the processing down, as long as you got there 3 hours in advance, sometimes more. A real burden on 1 hour flights to New York, Boston or Washington. Still a burden on my 5 hour flight to SFO, since that was at 7am, meaning getting to the airport at 4am, (1am Pacific Time, about the time I would get to bed.)
The process included the fairly standard x-ray (with agents making various exceptions for people, generally allowing books that could be paged through and even some small knapsacks) with pat down only if you set off the alarm. Then, shortly after you started walking down the row of gates was a 2nd checkpoint. There you got a serious patdown that might remind you of a massage, and a complete hand inspection of everything in your bags. (I suggest they should let you pay extra for a real massage, which also of course detects anything on your body.) Many checks of ID and boarding pass and you are on your way.
There are many disturbing things about the reaction to the underpants bomber but a few stand out.
- It is certain that the TSA and all other major agencies knew about the risk of somebody strapping explosives to their legs and taking them through the magnetometer. So a plan should have been in place long ago about what to do about it, and how to react at the first public incident.
- In spite of this the agencies are out running around like chickens with their heads cut off, changing plans every day, no sign of forethought. Are they just testing the public to see what they will tolerate?
- Lots of talk of thz scanners to see everybody naked. Is this a way to get those accepted, after people complained?
- For Toronto, and most of the Canadian airports, a bad guy can quite readily drive just 90 minutes and go to another airport like Buffalo and get no special screening! While the public does not like this extra trek, it’s no burden to the terrorist to do this. Only the innocent are punished.
- You could still smuggle your stuff inside a laptop, or a body cavity or several other places I noticed.
- Keep this up and people will stop flying, and they will definitely go to airports like Buffalo.
- As I have suggested before, appointments for security inspections are one answer to the 3 hour early arrival.
- For me the worst thing was packing lenses in checked bag. I had to improvise protection for them. When such a rule is put in place by surprise over Christmas, you have to expect a lot of people brought stuff that they needed to carry on on the way back, even if they would not plan a new trip today expecting to carry on their fragiles.
With some irony, all this came after a lunch with Peter Watts. If you didn’t hear, Peter was crossing back into Canada at Port Huron/Sarnia and got pull over for exit inspection leaving the USA. Because he wasn’t a complete little sheep, he reports he was beaten up by the border patrol and now is charged with assaulting an officer. I really doubt he did those things, but the most disturbing thing are those who comment on the story saying it’s his fault for not being subservient enough. I understand the reasons for letting police do their jobs, but when you are just inspecting people driving out of the country, with no special reason to believe they are criminals or worthy of above average suspicion or anything but the presumption of innocence we are all owed, then there should be standards, and better defined rights for the subject of the inspections. If a person is not a known threat, why should they not get to ask questions about what is being done to them and their vehicle? Yes, one time in many thousands, an actual nasty criminal might do something odd and need to be set upon with force. It’s one of the risks people take doing an armed policing job. It can happen anywhere, any time. But must the people give up their rights and be complete sheep because of it?
Can’t we have a system where different situations suggest different levels of police control? Where the police, while they may have the power to give you orders and you have to obey without much chance to question, get in trouble if they abuse that power in a non-hostile situation? Where they have a simple way of explaining that they think the situation has escalated, and a way to declare it that we are taught in school to understand? So if the copy says, “I’m escalation — get on the ground now” you have to get on the ground, but the cop has to justify later why he escalated. Simply being a citizen who is mindful of his rights doesn’t seem much grounds for that.
Submitted by brad on Mon, 2009-11-30 15:42.
It was over 5 years ago that I blogged about a robot that would travel in front of a train to spot cars stuck on the tracks in time to stop.
I recently read a local story about an RV that was demolished while stuck on the tracks here. The couple had time to talk to 911, who told them to get out, and it’s not clear from the story but it seems like a moderate amount of time may have passed (a couple of minutes) before their RV was smashed.
Here’s what should happen, and perhaps it does happen in some places:
- The 911 service should receive GPS and cell tower location on the caller. The moment the caller indicates they are stuck on the tracks, the 911 operator should push a button which figures out which tracks it might be and which trains might be approaching that crossing.
- Ideally trains are reporting their location with GPS as some do, but schedules can be used, or all trains anywhere near the area can be alerted.
- Signal lights close to the crossing should immediately go red, and cell phones of operators on the relevant trains should be called, and the computer or 911 operator can indicate which crossing is blocked. If the engineer is approaching that crossing they can emergency brake.
This can be enhanced a few ways:
- Each crossing can have a big sign, “If stuck, get out of vehicle immediately, clear track (show direction) and call 911, and give this crossing number NNN.” The crossing number would work even if GPS and cell towers don’t locate the crossing.
- Alternately, there could be a 10 digit phone number, different for each crossing. There is, however, some risk of abuse and false reports. You don’t want a war dialing telemarketer to stop trains. An operator may still need to confirm.
- As noted, the sign should try to tell people to clear to the area slightly “upstream” (ie. towards the oncoming train, but not on the tracks, obviously.) That’s because when the train hits the car it throws it sideways and forward, never backwards along the path the train came from.
- If you don’t see or hear a train, it makes slight sense to get out and call while walking so the call comes sooner. If you can see the train they can see you and it’s probably too late anyway. But human safety is more important.
- The trains may have another way to reach the engineer, such as a private radio system, but just having a cell phone on each train (plus knowing trains staff personal cell phones and calling all of them) seems like a quick and easy solution. The cell in the train can have a very loud and flashing ringer, especially if it’s an emergency call.
It takes a long time to stop a train, but I bet most vehicles that get stuck on the tracks are stuck minutes before the train comes.
Submitted by brad on Thu, 2009-11-19 17:45.
I struck a nerve several years ago when I blogged about the horrible beep-beep noise made by heavy equipment when it backs up. Eventually a British company came up with a solution: a pulsed burst of white noise which is very evident when you are near the backing up vehicle but which disperses quickly so it doesn’t travel and annoy people a mile away as the beeps do.
Now I am seeing more and more suggestions that electric cars, which run quite silently when slow, make some noise for safety. This is fine, but there are also suggestions that there will be music and vanity noises, like ringtones or “cartones.” I can certainly see why this would appeal to people. (Already many think that their car is the place to play mind-numbing bass to announce musical taste to all others on the street.) There are even proposed laws.
While the cartones would be quieter than the backup beep or the heavy bass, I really fear that people will overdo what they think is the purpose — being attention grabbing. They will want to distract, and that will create a cacophony on the roads. It’s hard to make sounds that are meant to be attention grabbing (or vanity oriented) not travel beyond the range that you need them for safety.
I don’t want to imagine what it might be like living as I do with a 3-way stop outside my window, with each car singing a different tune or strange noise every time it slows down and starts up again. Who will want to live near intersections or parking lots?
I have a few proposals:
- Like the beep-beep solution, use white noise that just doesn’t travel very far, but is easily noticed when close.
- Use natural sounds, like waves crashing, birds chirping, wind blowing. We are tuned to hear those sounds in an otherwise silent environment, but our brains also can easily ignore them in background form.
- Do indeed tune the volume based on ambient noise. This is suggested in the O’Reilly article linked above. They propose it to be loud enough. It should also be quiet enough.
- Don’t do it at a speed where the tires and wind and electric motors are making enough noise already.
- As robocar sensors become more common, such as LIDAR and radar, only make the noise when there are people who might come in contact with the vehicle. Otherwise, be silent.
- Since robocars will not hit people in any normal operation, even people who don’t know they are there, such vehicles need not make any noise. HOwever, if they see a human or anything else on a collision course, let them make a more loud and useful noise that really gets attention, like a burst of white or pink noise, or even a horn if they ignore that. Start quiet, get louder if it is not reacted to in a human reaction time.
Let’s not give up on this opportunity to return peace to our public spaces as electric cars and robocars become popular.
Submitted by brad on Wed, 2009-09-09 11:40.
After every RV trip (I’m back from Burning Man) I think of more I want RVs to do. This year, as we have for many years, we built a power distribution system with a master generator rather than having each RV run its own noisy, smelly and inefficient generator. However, this is expensive and a lot of work for a small group, it is cheap and a lot of work for a larger group.
There’s been a revolution in small generator design of late thanks to the declining cost of inverters and other power conversion. A modern quality generator feeds the output of its windings to circuits to step up and step down the voltage to produce the required power. The output power is cleaner and more stable, and the generator is spun at different RPMs based on the power load, making it quieter and more efficient. With many models, you can also combine the internal output of two generators to produce a higher power generator.
RVs have come with expensive old-style generators that are quieter than cheap ones, and which produce better power, but today they are moving to inverter generators. With an inverter generator, it’s also possible to draw on the RV batteries for power surges (such as starting an AC or microwave) beyond what the generator can do.
I’m interested in the potential for smarter power, so what I would like to see is a way for a group of RVs with new generation power systems to plug together. In this way, they could all make use of the power in the other vehicles, and in most cases only a fraction of the generators would need to be running to provide power to all. (For example, at night, only one generator could power a whole cluster. In the day, with ACs running, several would need to run, but it would be very unlikely to have to run all, or even 75% of them.) read more »
Submitted by brad on Tue, 2009-08-25 23:39.
RVs all have a fresh water tank. When you rent one, they will often tell you not to drink that water. That’s because the tanks are being filled up in all sorts of random places, out of the control of the rental company, and while it’s probably safe, they don’t want to promise it, nor disinfect the tank every rental.
I recently got a small “pen” which you put in a cup of water and it shines a UV light for 30 seconds to kill any nasties in the water. While I have not tried to test it on infected water, I presume that it works.
So it seems it makes sense to me to install this sort of UV tube in the fresh water tank of RVs. Run it from time to time, and particularly after a fill, and be sure the water is clean. Indeed, with an appropriate filter, and a 2nd pump, such an RV could happily fill its water tank from clear lakes and streams, allowing longer dry camping which should have a market. Though of course the gray/black water tanks still will get full, but outside showers and drinking do not fill those tanks.
A urination-only toilet could also be done if near a stream or lake.
Submitted by brad on Mon, 2009-02-09 20:29.
Recently, some prosecutors, in efforts to crack down on drunk driving, are pushing for murder convictions. This is happening in the case of really blatant disregard on the part of the drunk drivers — people with multiple DUIs getting smashed, going out, and killing.
In watching coverage of this trend, over and over again I heard it said that the killer’s sin was “getting behind the wheel when drunk.” And that is in fact what we punish with DUI laws. Because so many people have done it (without killing anybody) there is surprising sympathy for the drunk drivers — there but for the grace of god go I.
But is that the right sin? That decision is always made once the person has impaired judgement. Something to me seems wrong about punishing a decision made when one has lost the ability to make good decisions. While I don’t drink, and have no sympathy for the actions of drunks, I think the real transgression comes much earlier.
The real transgression is allowing yourself to get impaired in circumstances where you would then be sufficiently likely to make deadly wrong decisions. A simple example of this would be having enough alcohol to move from sober to drunk when you have your car with you and plan to drive home. Of course, many people in that situation will do the right thing, and still be clear enough to know they should get a cab home, and then come back to pick up their car later. But of course, many don’t. And worse, there is often an incentive not to — such as paying for two taxi fares, and dealing with the car’s location becoming a no-parking zone in the morning.
I believe people should be punished for risky decisions they make while sober, more so than ones they make while drunk. It should be expected that people will make poor decisions and take unacceptable risks when drunk. That is what impairment means. It is the decisions they make when sober, when they know right from wrong, that the law should punish.
Now let me describe how this might work in theory, and then discuss the harder question of making it work in practice.
The simplest way to behave well is to never take your car to go drinking. That car parked outside is too much temptation once you are drunk. And this is what the designated driver concept is about. To get more specific, you must not take the drinks that make you impaired without first, while still not so impaired, making plans to get home so you have no temptation to drive your car. This can include arranging a ride with a sober person, pre-contracting with a taxi company for later pickup, or putting your car keys into escrow.
Car key escrow, for example, would involve giving the keys to a friend or the bartender, who will not return them to you until you are sober. A high-tech version might be a simple lockbox. You can put your keys in the lockbox (provided by a responsible bar) and can only get them out by blowing into the box with alcohol below the limit. The act of escrow, taken while sober, makes you legal. The act of drinking beyond your limit without making alternate plans is the immoral act. Having any recorded plan for getting home — cab, designated driver, transit ticket, keys in escrow — is enough to be acting morally.
Now how to enforce this? Well, we can’t really have police coming into bars, and asking all patrons who are beyond the limit to prove they made alternate plans. Police could check inebriated people leaving bars, but don’t typically have the time for this. If this sort of rule is to be enforced, it would have to be through legal liability on those who serve alcohol (bars, party hosts) to assure none of their guests go beyond the limit without plans, or at least the easy ability to make plans. (Cheap key lockboxes might help in this area.)
And of course, anybody who did drive drunk would be guilty since they obviously didn’t make adequate plans. This approach would simply expand the culpable act to the broader situation of having deliberately (while sober) put yourself in a situation where this has a real chance of taking place.
There are problems of course. Often “guests” come to parties uninvited and get drunk. We’ve all had a fairly drunk person at a party we barely know. Or we may not know the drinking habits of the friends we do invite. Bartenders deal with people arriving who already got sauced at another bar and just have the last few drinks before they drive in the 2nd bar. We want people to act responsibly, not have to go overboard and be paranoid about each guest. Ideally we want the full weight of the law to fall on the sober person who got drunk while his or her car was outside.
One unconnected option might make sense. Parking laws might be changed to let you get out of certain kinds of parking tickets if you can show proof you took an alternate way home because you are drunk. Taxi drivers who take drunks home could issue such a dated receipt. Friends could testify under oath that they drove you home because you were drunk. This might make people more willing to leave cars behind in certain areas. It would have to be clear what those areas were (for example, parking that was free at night but becomes metered or prohibited at 7am) so that the parking does not become a problem. Still the extra parked cars are a better thing to have than cars with drunks behind the wheel.
Submitted by brad on Mon, 2008-11-10 21:53.
Here are some notes based on my recent trip to Finland, Sweden and Russia. Not about the places — that will come with photos later — but about the travel itself.
The ferries between Helsinki and Stockholm are really cruise ships. It takes about 16 hours and is a very popular method of travel between the cities, especially for families. There is no really practical land route, and the competition keeps the prices of these things down. In addition, they play tricks to allow duty free shopping, and unlike many duty free shops which are just ripoffs, these ones are competitive and do a brisk business. I’m told they are also party boats, but due to jet lag I was asleep not long after the Smörgåsbord. Unlike most cruise ships, these have almost nothing included, not the sauna, not the food and probably not even the mandatory showing of Abba’s “Mamma Mia.”
Because it the boat left at sunset and I planned to be awake and above at sunrise for photography of the Swedish Archipelago, and the moon was new, I decided there would be nothing to see, and I took an inside cabin. I was surprised to learn that, even though I knew it was dark and largely featureless outside, it bothered me to be in the sealed room. I reiterate my call that ship inside cabins come with a TV showing a closed circuit view of the outside in the correct direction. If they are not ready to do that (this ship didn’t even have TVs) I think a light behind the curtains of the fake window which simulates, based on just the clock, what the light should be like outside, would actually still be a positive step.
Or, failing that, if they put internet in the rooms, people could display the closed circuit video on the screen they brought with them…
On a ship like this, the shower takes up a lot of a very small room while being very cramped anyway. While most people want a toilet in their room, some communal locker room showers might make sense for preserving space. Of course, you still need a lot of them as demand comes at the same time, but not quite as many.
I think I’ll go back to a window for my next cruise cabin. But not a balcony. I have found that when I’ve had a balcony I sat on it for an hour of the entire week, and it took a lot of space out of the cabin.
The nice thing about the overnight cruise, of course, is that it made the trip between cities happen at night, offering a near full day in each city on either end. The arrival is a bit late at 10am, but that time is spent on a cruise of the islands, which all Stockholm tourists want anyway. It made me wonder if it was possible to arrange that sort of travel among close coastal cities in the USA or Canada (Boston to DC?) but perhaps the seas are not as reliable. And of course there is the Jones Act.
For the tourist, it also means the cruise is one of your hotel nights, and it costs only a little more for two people than a typical Stockholm hotel.
Taxi in Stockholm
Arriving in Stockholm, I was advised I should take a cab to our hotel and it would cost under $20. I had to eat my own words about cab competition because I got into a predator cab in the line at the ferry terminal which charged 5 times the typical rates. A few blocks away we noticed the meter going up one SEK (13 cents) per second and asked the driver to stop. He got abusive and threatening, and with my luggage implicitly hostage, I paid $25 to be dumped on the street in the rain with 3 suitcases and no SEK. Turned out there was a subway stop not far away, though that’s no fun with lots of bags.
Turns out the cabs do have their prices on them in the window, and no Swede would hire such a cab, but tourists unaware of the system can be easy marks, so no surprise this cab was at the ferry terminal. I had written earlier that I don’t believe in the heavy Taxi regulation most cities have, though I had come so much to expect it I got burned. The main argument for the regulation is that you can’t shop while standing waiting to hail a cab, but I can now see another argument about it on taxis serving people who will not know the local markets.
Stockholm transit was quite good, and we got an unlimited pass so used it a lot, though in many cases a cab would have probably saved valuable time. But we were so burned by our first Stockholm taxi experience that we just never felt the desire to use one again until the trip to the airport, which we had the hotel arrange.
Transit in St. Petersburg
St. Petersburg transit is a very different experience. It’s cheap: Typical fare of 16-18 rubles (around 60 cents) for official transit, 23 rubles for private buses that are more common. It’s very heavily used. Oddly, there did not appear to be transfers. If you wanted to change from trolley to bus, you seemed to pay again, or so our host told us. While at the low price this should not be a problem, it does mean you’re more likely to walk if you only have to go one or two stops on the 2nd leg.
The subway (which is quite grand, a Soviet showpiece) was packed to the gills on Sunday afternoon. We didn’t ride it during rush hour, and I’m glad. The subway isn’t actually terribly useful for the city core where the tourist sites are, though there happened to be a stop near our nice B&B.
Transport to/from the airport is another story, with most services seeming to run 40 to 60 Euros, though our host arranged a private car (by which I mean, just some guy’s Volga) for 30 Euros. We didn’t try it, but there is also an ad-hoc private taxi system. Stick out your arm and a private citizen will come pull over and negotiate a price, if they are going your way.
As noted, our driver had a Volga, but generally the streets are full of foreign cars. The car everybody wants is a Corolla. Ford is making big inroads too, along with Hyundai.
Finnair is charging for soft drinks on board, that trend is growing. ?????? (Rossiya) airlines still uses paper tickets, that was strange and frustrating. United Airlines won’t let a Premier member upgrade on a United Flight if their ticket came from Lufthansa (which I needed to do to make the Finnair connection as UA doesn’t partner with them.)
When I got my HTC Mogul phone, it had a GPS inside it, but the firmware didn’t enable it. So while in Germany in January, I used an external bluetooth GPS which worked OK, if being a bit silly. After I got back I got a phone firmware upgrade, which enabled the internal GPS, which has been very handy since then. When I got back to Europe I discovered two annoying things:
- While the GPS does use assisted GPS from the cell towers to work faster in the USA, it is a full GPS able to work away from them. But not in Europe, where it refused to work, even when it could see 5 or 6 satellites. Some report getting the phone GPS to wake up after 10-20 minutes but it never did for me.
- Alas, when they enabled the internal GPS, they disabled the ability to use an external bluetooth GPS through the official WINCE GPS API. So I was worse off than before.
- While a few programs could use the external GPS because you could manually configure them to use a different port, the offline map program I had downloaded could not. This had a real cost, as I ended up taking a few wrong turns and taking a few wrong street cars without knowing which direction I was going.
So brickbats for Sprint/HTC for this bizarre configuration, and I hope they fix it.
Submitted by brad on Tue, 2008-10-14 21:00.
I’ve written a few times about the “Selfish Merge” problem. Recently, reading the new book Traffic: Why We Drive the Way We Do by Tom Vanderbilt, I came upon some new research that has changed and refined my thinking.
The selfish merge problem occurs when two lanes reduce to one. Typically, most people try to be “good” and merge early, and that leaves the right lane, which is ending, mostly vacant. So some people zoom ahead of everybody in the right lane, and then merge at the very end. This is selfish in the sense that butting into any line is selfish. Even if overall traffic flow is not reduced (and even if it is increased) the person butting in moves everybody back one slot so they can get ahead by many slots. This angers people and generates more counter-productive behaviour, including road rage, and attempts to straddle the lanes so that the selfish mergers can’t move up to the merge point.
In Traffic, Vanderbilt writes of surprising research that changed his mind, which showed that, in simulations, some merging forms provided up to 15% more traffic throughput than proper attempts at a zipper merge. In particular, a non-selfish merge fully using the vanishing lane worked better than the typical butt-in situation described at the top.
In this merge, which I’ll call the “slow and fair merge,” drivers are told to use both lanes up to the merge-point, and then to fairly “take their turn” at the merge point entering the continuing lane. Nobody is selfish here, in that nobody butts ahead of anybody else, but both lanes are fully utilized up to the merge point.
This problem is complex, I believe, because there is a switch-over point, which I call the “collapse” point. This is the point at which the merge flow becomes high enough that traffic collapses to “stop and go” mode, before and at the merge-point. Before that point, in lighter traffic, there is little doubt (for reasons you will see below) that the “cooperating fast zipper” merge results in the best traffic flow. In particular, there are traffic volumes where you could either have cooperating zipper or “slow and fair” but cooperating zipper would do a fair bit better. There are also traffic volumes where cooperating zipper just isn’t possible any more, and we will either have “slow and fair” (which has the best volume) or “selfish merge” which has a worse volume.
Real world experiments show different results from the theoretical. In particular, many drivers, used to the anarchic selfish-merge approach, don’t understand fair and slow, even when signs are explicit about it, and so they resist using both lanes and try to merge early. They also try to straddle, devolving to selfish merge. An experiment with digital signs which changed from advising drivers to zipper-merge in light traffic to advising “use both lanes” and “merge here, take your turn” in heavier traffic was disobeyed in fair and slow mode by too many drivers. The experiment ended before people could learn the system. read more »
Submitted by brad on Thu, 2008-10-09 12:26.
Ford is making a new car-limiting system called MyKey standard in future models. This allows the car owner to enable various limits and permissions on the keys they give to their teen-agers. Limits included in the current system include an 80 mph speed limit, a 40% volume limit on the stereo, never-ending seatbelt reminders, earlier low-fuel warnings, audio speed alerts and inability to disable various safety systems.
My reaction is of course mixed. If you own something, it is reasonable for you to be able to constrain its use by people you lend it to. At the same time it is easy to see this literal paternalism turn into social paternalism. While it’s always been possible to build cars that, for example, can’t go over the speed limit, it’s always been seen as a “non-starter” with the public. The more cars that are out there which have governors on them, the more used to the idea people will get. (“Valet” keys that can’t go over 25mph or open the trunk have been common for some time.)
This is going to be one of the big questions on the path to Robocars — will they be able to violate traffic laws at the command of their owners? I have an essay on that coming up for the future, where I will also ask how much sense traffic laws make in a robocar world.
The Ford key limits speed to 80mph to allow the teen to pass on the highway. Of course on some highways here you could not go in the fast lane with that governor on, which probably suits the parents just fine. What they probably want would be more a limit on average speed, allowing the teen to, for short periods, burst to the full power of the car if it’s needed, but not from a standing start, and of course with advanced warning when the car has gone too fast too long to give a chance to safely slow down.
The earlier low-gas warning is just silly. The earlier you make a warning, the more you teach people to ignore it. If you have an early warning (subtle) and then a “this time we really mean it” warning most people will probably just use the second one. Many cars with digital fuel meters refuse to estimate fuel left below a certain amount, because they don’t want to be blamed for making you think you have more gas than you do. So they tell you nothing instead, which is silly.
What might make more sense would be the ability to make full use of speed, but the threat of reporting it to mom & dad if it’s over-used. (Such a product would be easy to add to existing cars, I wonder if anybody has made a product like that?) Ideally the product would warn the teen if they were getting close to the limit, to let them govern themselves, knowing that they would face a lecture and complete loss of car privileges if they go over the limitations.
On one hand, this is less paternalistic, because it does not constrain the vehicle and teaches the child to discipline themselves rather than making technology enforce the discipline. On the other hand, it is somewhat Orwellian, though the system need not report the particulars of the infringement, just the fact of it. Though we can certainly see parents wanting to know all the details.
Of course, we’ll see a lot more of that sort of surveillance asked for. Track-logs from the GPS in fact. Logging GPSs that can be hidden in cars cost only $80, and I am sure parents are buying them. (I have one, they are handy for geotagging photos.) We might also start seeing “smart” logging systems that measure speed infractions based on what road you are on. Ie. 80mph not near any highway is an infraction but on the highway it isn’t.
I doubt we’ll be able to stop this sort of governing or monitoring technology — so how can we bend it to protect freedom and privacy?
Submitted by brad on Mon, 2008-06-09 20:11.
As part of my research into robotic cars, I’ve been studying the energy efficiency of transit. What I found shocked me, because it turns out that in the USA, our transit systems aren’t green at all. Several of the modes, such as buses, as well as the light rail and subway systems of most towns, consume more energy per passenger-mile than cars do, when averaged out. The better cities and the better modes do beat the cars, but only by a little bit. And new generation efficient cars beat the transit almost every time, and electric scooters beat everything hands down.
I encourage you to read the more detailed essay I have prepared on whether green U.S. transit is a myth. I’ve been very surprised by what I’ve found. It includes links to the sources. To tease you, here’s the chart I have calculated on the energy efficiency of the various modes. Read on, and show me how these numbers are wrong if you can!
I have added a follow-up post on the comparison between lots of small personal ultralight vehicles and larger shared transit vehicles.
Note: If you want to comment on the cyclist figure, there is different thread on the fossil fuel consumption in human food which details these numbers and invites comments.