Google Adds Real-Time Traffic to Maps

Google said Wednesday it had updated its Maps service in more than 30 major United States cities to include real-time traffic information. A new "Traffic" button joins the Map, Satellite and Hybrid options already available, overlaying road conditions with green, yellow and red colors.

"If your route shows red, you're looking at a stop-and-go commute; yellow, you could be a little late for dinner; green, you've got smooth sailing," explained Google software engineer David Wang. Supported cities include New York, Chicago, San Francisco, Los Angeles, Dallas, Washington DC among others.