Pleasanton is about to turn the fast into the furious.
In a move unprecedented in the Bay Area, the city's traffic engineers have created a traffic signal with attitude. It senses when a speeder is approaching and metes out swift punishment.
It doesn't write a ticket. It immediately turns from green to yellow to red.
http://sfgate.com/cgi-bin/article.cgi?file=/c/a/2004/04/07/MNG8N61MGG1.DTL
so if one guys is speeding he'll turn the light red for everybody else on the road. :|