Miami 30 years
100k for a good idea?! Read on, no one has said this!!!!
Stricter algorithms; the CHEAPEST, FASTEST , solution, NO CONSTRUCTION , is to do something like uber or googles maps gps but increasing or making a new algorithm.
The chief of police and mayor can also put out more traffic cops instead of just ones that go for guns and drugs. I dont think they have enough cops pulling people over strictly for traffic infractions.