Bing Maps AJAX v7 control can now show traffic incidents in addition to traffic flow and gives you the control to show or hide both with the new TrafficManager. Check out the following view of Seattle traffic flow and incidents. Hovering over an incident bring up details including time and duration. You can find the sample that created this view and more details on the TrafficManager page.
Note: The TrafficManager class replaces and enhances the functionality provided by the TrafficFlow class which is now deprecated, but will continue to be supported.