Google Maps adds real-time traffic data

Google has added real-time traffic data for major highways in more than 30 American cities to Google Maps. The data is color-coded to signify traffic conditions: green means no congestion; yellow minor holdups; and red means significant slowdowns. According to Google product manager Carl Sjogreen, the data is aggregated from several sources including road sensors, as well as car and taxi fleets. As a result, Sjogreen said, there is sometimes not enough data to report road conditions. In that case, the roads appear gray.

Source: News.com