There can be a strange aggressiveness that comes out on our roads.
Whether its a peloton of cyclists daring a car to rightfully proceed through a green light as they run the red; the " you can't hit me cuz you see me " jaywalker;  or the black F150 who "airbrushes"road cyclists on a country road. 
Its something deep in human nature, and it plays out in every corner of the world I've ever been in.
Then mix in a dose of carelessness, tireness, distraction...
I am uncertain whether heftier negative consequences will work.
On this one I go with a tempered version of " assume they are out to kill ya and govern yourself accordingly "