[arprocter]

I wonder how much of this is mitigated by good lane discipline?

My SO actually got pulled over the other day (or at least that's what the cop used as an excuse) for driving in a passing lane when not passing anything. I said I was glad because it's a terrible habit - every lane ending up going the same speed as the slowest driver

[gerbilly]

>every lane ending up going the same speed as the slowest driver

And if two drivers drive abreast, then it's like having two roads going to the same place, where no one can pass anyone.

[danenania]

Lane discipline makes a huge difference. It's what makes driving 110mph on the Autobahn safer than driving 70 on a busy US highway.