The goal should be to increase safety. The measures should be the number and severity of crashes as well as the free flow of traffic.
One thing that I think should be illegal is using cell phones while driving. And I mean cell phones at all, not just hands-free.
Actually, that law does make sense. It makes a lot of sense to know when people are going to turn so that you can take appropriate action not to hit the car, like get in the other lane.
Jeff
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Safety: The surveillance cameras should be put to better use. Any time they record an accident, the video should be posted online for the public to view. Even better, put them on all local TV channels.
Signaling: It also improves the flow of traffic. Any measure which minimizes the use of brakes is a good thing. Prevents the rubber band effect.