i see cars honking at pregnant women pushing strollers in crosswalks quite regularily around here, not to mention kids, old folks, having to do the 'reverse walk' when drivers fail to yield to them-
America's drivers are collectively quite awful. i think the psychological factors involve anonominity, goals/delays and me-ism at the expense of social order. lack of common courtesy is epidemic in this country; put people already frustrated with their everyday lives behind the wheel of a large automobile to get stuck in traffic and burn hard earned dollars up in gas every week, and a two ton gorrilla with horrible road manners is born.
Then, these people go out and frustrate other drivers, and begat more road rage.... Americans are almost pathlogically uncooperative.