As part of the NPR Cities Project, we're exploring some "gee-whiz" questions about how cities work. Melissa Block talks to Gideon Berger, Fellowship Director for the Urban Land Institute, on the street in Washington, D.C.'s Chinatown. They talk about the trickiness of timing traffic lights
What Goes Into Timing Traffic Lights?
Originally published on August 14, 2012 6:04 pm