Signal

Reuters

The Oz of Los Angeles Traffic Lights

How the city controls its traffic system, then and now.

Reuters

How Timed Traffic Signals Can Be Bad for Pedestrians

Efforts to fight congestion by centralizing traffic lights could also make roads more dangerous for walkers

Flickr/Drew Geraets

Fighting Congestion in Minneapolis on a Tight Budget

Minneapolis confronts bad traffic with cost-effective technology and a transit-first philosophy