I bike about 4-5,000 miles per year in the Maryland/DC area but I also drive about 20,000 miles per year. Over 40 years of doing that, from the view on the bike I really haven't seen much change at all. The same stretches of road are bad for cycling, the drivers on the roads I do ride on seem to be about the same level of close pass, right hook/left hook, etc. kind of behavior - which is actually a pretty small percentage of drivers. Pretty close to the percentage of cyclists doing dumb stuff, but the percentage is applied to a much higher volume with a much higher damage potential.

Driving my car, I drive on many stretches I rarely bike on and I want to say driving habits have definitely gotten worse - but I think everyone who gets older has said that for the past 100 years! Probably more - I bet in the 1800s they were saying "These young fools don't know how to ride a horse..."

But, the greatly reduced use of turn signals seems real to me, and the driving while texting is noticeable and new, too.

As a cyclist, so many of the roads around here have gotten better, with wider shoulders, bike lanes or just wider riding surfaces, that much of my cycling feels safer than it ever did.

The one major change for the negative: more dual lane traffic circles vs. traffic light controlled intersections. Traffic circles (roundabouts) are fine for cycling on single lane roads, but making a left turn around a two lane traffic circle is no fun to me! But around here they seem to invent intersections just to put new traffic circles in! I try to route around those where possible but they are popping up in a lot of new places on my established routes.