[blasdel]

The cost of pulling over cars in city traffic is incredibly high. In downtown Seattle the police ignore automobile moving violations as a matter of policy. I've seen a guy with a car full of rowdy passengers turn the wrong way down a 4 lane one-way throughfare almost hitting a cop car head on, and all the cop cared about was getting him going the right way.

On the other hand, they will apply the full motor vehicle code to bicyclists, and they actively ticket pedestrians for jaywalking.