I don't know how many other states have this but Iowa started this last year. You load the map and click on the blue dots to see a picture taken through the windshield of the plow truck. The map also has the radar running ghostly in the backround. Pretty cool. tmm
http://iowadot.maps.arcgis.com/apps/webappviewer/index.html?id=3d5bc4ec8c474870a19c7e8f44b39c9c
http://iowadot.maps.arcgis.com/apps/webappviewer/index.html?id=3d5bc4ec8c474870a19c7e8f44b39c9c