Autobahn: Lane discipline in the US is terrible! (It's
not just CA.) People tend to get a clue in the middle
of nowhere when traffic is light, but sadly not in
urban/congested areas.

Borders: Doesn't this have something to do with the
Schwengen zone? Once you're in the zone, travel between
countries is easier. Yes, we should have something
like that with Canada.

Tunnels: Yes, they keep snow off the roads -- in the
form of avalanches, which are not only potentially deadly
but could effectively close the road until the snow melts.

It's interesting to discover how things are done differently
in other countries. Most Americans are too isolated in both
geography and attitude and lack a true world view.