[sickbeard]

Vehicles talking to each other will not break a practical traffic jam. The one caused because one car had to stop for some reason or other, now everyone has to stop or slow down in the same vicinity until there are less cars flowing through the area.

[creeble]

I'm not so sure. I think the big difference it would make to have cars talking to each other is that they can all know where the other (within a local range) is heading, make interchanges more optimal.

A lot of traffic congestion happens because we have nothing but (too-infrequently-used) turn signals to indicate our intentions. If all the cars knew where they were going at an interchange, you could at least optimize the flow.

Of course, there is _no_ solution when there are just too many cars trying to fit on a road that can't handle it. And that's probably 80-90% of the problem anyway :(