Google Traffic isn’t the official name for it, but I think it should be. Head over to Google Maps find a major city and then click the traffic button in the upper right corner. All of the major routes through the city will be color coded according to how quickly traffic is moving. You also have the option of looking at how traffic will be at a different time of the day. Click on “change” next to “Live Traffic” and adjust the slider to the time of day that you’ll be traveling. Traffic is also figured into driving directions. You’ll now see an estimated time for your directions, and a new up to … in traffic estimate. From what I can tell the real-time data seems to be rather accurate. Except that by the time your on the road for 15 minutes, everything could have changed.