The Southeast Michigan Snow and Ice Management (SEMSIM) project is a multi-agency Automatic Vehicle Location (AVL) system that will use 500 highway maintenance vehicles equipped with Global Positioning Systems (GPS) receivers and sensors to monitor snow plow use, rate of application for de-icing materials, and air and road temperatures. Equipping a fleet of 500 vehicles will be attained through a phased approached. In 2002, the system cost approximately $1.862 million to equip 292 vehicles. The system included the development, manufacturing, testing, and integration of software and hardware components (vehicle logic unit, mobile data terminal (MDT), sensors, bracket and wiring harness), and communications. Each vehicle will use 900 MHz communications, and transmit data to a centralized system where the data will be uploaded onto an Internet server and made available to other agencies.

As of November 2003, 375 vehicles were operational.

See Also:
http://www.rcocweb.org/home/semsim.asp