I've lived in the Sacto area for approx. 18 years and have noticed that traffic etiquette has gotten worse with growth of the cities. Folsom used to be a nice quiet country road drive. People were polite and would waive you in - now, people take pains to cut you off or run you down.
I've seen landrovers and SUV mom's speed up to RED LIGHTS and just go through them like they didn't exist. Every week there is an accident by Iron Point and Priarie City Road. Mind you these are not teenagers getting into these accidents but adults!
Broadstone Parkway and Iron Point Road is the worse. People stop at the red light - look around - and then just go through them. Being the curious george that I am, I try to catch up to these people and look at their license plates to see where the heck these people come from. I've noticed that 9 out of 10 of the red light runners are NOT SACRAMENTO LOCALS. They come from Illinois, MA, Bay and LA.
My insurance rates for the past 18 years has tripled!! Sigh!

It's not a coincidence that Sacramento has also grown three times it's size.