Something I've always thought about is smart traffic. If nobody else is at the intersection I shouldn't have to wait at the red light. On a large scale the econ

Something I've always thought about is smart traffic. If nobody else is at the intersection I shouldn't have to wait at the red light. On a large scale the economic benefits would be amazing - faster transport, higher car mileages across the board (fewer hard stops for cars), increased efficiency, happier people.