Which Types of Traffic Signals Are the Safest?

With so much focus on large-scale design and enforcement measures, it's important to remember that often, the quickest and most direct way a city can improve safety at an intersection is with traffic signals. Traffic lights are neither as ubiquitous as they might seem (even in New York, only a quarter of all intersections have four-way signals) nor as simple. New research in the journal Transport Policy evaluates four common light structures found across the city: basic signal installation, increased pedestrian cycles, the Barnes dance, and split-phase timing. Read more.