The reason we are seeing more bad driving is probably more congestion. The evironazis and nimby's just won't let anyone build a new road, so we have roads built to accommodate 1970 traffic carrying three to five times as much volume. Throw in exclusionary zoning which makes for larger parcels, and cul-de-sac's which limit traffic to a few paths, and we have annoyed drivers in bad traffic even after they paid much more gas tax after 1982 to pay for those roads. Instead all they are getiing is sound barriers, but no lanes.