Cities can do that, but states need to do three things as well: compulsory registration, licensing, and insurance for bicycles.
Why? Nobody knows how many bikes are really out there, and noboby does any enforcement of traffic laws wrt them. As I walk to work, I observe all manner of braindead behavior on the parts of cyclists. Also, cyclists don't behave consistently unless they are real enthusiasts -- many of them don't know the rules of the road. (becuase they don't know them!)
Registration or licensing would at least establish a minimum standard of training. Insurance would enforce compliance -- cyclists with bad records would become uninsurable. Insurance would also bring a powerful lobbying force to the state legislatures to improve road conditions for bikes.
Why? Nobody knows how many bikes are really out there, and noboby does any enforcement of traffic laws wrt them. As I walk to work, I observe all manner of braindead behavior on the parts of cyclists. Also, cyclists don't behave consistently unless they are real enthusiasts -- many of them don't know the rules of the road. (becuase they don't know them!)
Registration or licensing would at least establish a minimum standard of training. Insurance would enforce compliance -- cyclists with bad records would become uninsurable. Insurance would also bring a powerful lobbying force to the state legislatures to improve road conditions for bikes.