As far as the courtesy side of traffic goes, I would think that a lot could be improved with just enforcement and awareness of the existing laws (impeding traffic, merging, etc). When you get into the issue of gridlock, that delivers an entirely different logistical challenge of improving commute time with little or no ability to expand our current infrastructure. As much as I hate to sound like the Socialist EU traffic Nazi, I have to say that they were much smarter in developing, and continuing to develop new railways that span the entire continent, actually more if you count the other side of the Urals. Over there, you have a traffic light for pedestrians, one for bicycles and finally one for traffic in the inner city, with mass transit generally occurring below ground. People follow the traffic laws at the intersections and on the roadways, and unless you're willing to pay about 10/gallon for petrol, you take the train everywhere, because it goes everywhere. We as a nation will never be able to afford the labor to put this together here without going trillions again into debt. The last time we sent railway expansion across the nation, or labor was much cheaper (see immigrant/slave labor). There's also that pesky eminent domain issue (jk, I wouldn't want them taking my house for a railway either, unless they paid what I was asking, not what they were willing to give). That's not to say that they don't have commuter problems as well, it's faster to walk from Waterloo to Heathrow than it is to get a cab from Parliment to Westminster Abbey. But if they didn't have that infrastructure, it would be much, much worse. At the end of the day, there's nothing we can do about overcrowded commutes until we send you to a road crew when you sign up for selective service. So, it's moot. Doesn't mean that you couldn't express a little courtesy to the other minions out there trying to make an honest living. I'm gonna buy a yurt and apply for a ski patrol position, that'll fix everything.