To Curb Speeding, Turn to the Traffic Light: Citylab

 At Bloomberg Citylab, David Zipper explains how traffic light timing can be an effective safety intervention. Why should that be exciting? Because officials have observed that these interventions often fly under the radar. Cheaper and easier to implement than measures like radar signs, speed humps and lane reductions, variations in light programming can nonetheless have a profound effect on drivers behavior. One traffic signal strategy, called "rest in red," sets red as the default state of a traffic light in all directions, changing to green only when a car approaches and stops, which has proven effective at reducing speeding at crash-prone intersections.