NPR Cities: Urban Life In The 21st Century
4:47 pm
Tue August 14, 2012

What Goes Into Timing Traffic Lights?

Originally published on Tue August 14, 2012 6:04 pm

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