More so east-coast roads. It seems to me like the west coast has more traffic-calming devices (though my experience there is limited to two weeks of bicycling in Seattle and Portland). Our idea of "traffic calming" on the east coast is to add strobe lights to traffic signals.
I dunno, east-coasters seem to have more road rage too. When you get to New York, people are completely and utterly pissed at eachother. Every time I go to Chicago, I notice that drivers all seem to have this underlying urge to kill all pedestrians which we don't get in California.
I spent a weekend in Chicago and saw more pedestrians in near-death situations than in the rest of my life, cumulative. Where on Earth does that come from?