Are you driving to work every day and you are getting stuck in traffic regularly? If you do, you might want to download this free Bing Traffic Gadget!
Traffic Gadget for 90+ US Cities
You can choose from about 90+ US cities. All of the traffic data is provided by traffic.com
You can define a route and then change it based on the traffic data. Many low-traffic highways are covered by this traffic gadget, but I am not sure how accurate it is, so you should probably also give the Google Traffic Gadget a try if you find this handy.
The maps of the Bing traffic gadget are very cool and highlight slow traffic lanes with blank/red/yellow and faster routes with green.