Microsoft recently announced that Bing Maps now provides more accurate trip times when calculating directions around the globe using Microsoft Research’s Clearflow technology. Clearflow technology predicts traffic on roads that do not provide live traffic data and it worked well in the United States, and now Microsoft will be using it in every country with Bing Maps traffic coverage. So, Bing Maps now supports traffic-aware routing worldwide.
When calculating traffic-based trip time and directions, we use several data points, including both live traffic data and extrapolated traffic data. This extrapolated data helps us determine what traffic is like on roads that do not report live traffic data. For example, Bing Maps extrapolates traffic on the ramps on a highway by considering live traffic data for the highway itself and traffic on the surrounding surface streets.
Read about Clearflow functionality from Microsoft Research.