The Ann Arbor plow truck public tracking page shows where the snow plows are out and about in Ann Arbor.
Plow routes are color coded, and plow trucks are numbered. One tip: if you are using Chrome, turn on and off the "label" field to get the trucks to show.
The system is build by Radio Satellite Integrators, and uses ESRI map technology. I don't have an explanation for the US-12 shield on Jackson Road.