MIT’s CarTel, a distributed, mobile sensor network and telematics system, combines mapping WiFi access points in the Boston metro area with a Web site that shows all the trips made by a driver and provides interesting ways to visualize one’s trips, individually and collectively.

A small embedded computer, about the size of a cellphone, is placed in the glove box and links to sensors in the car. Unlike traditional automotive telematics systems that rely on cellular or satellite connectivity, CarTel uses wireless networks opportunistically. It uses a combination of WiFi, Bluetooth, and cellular connectivity, using whatever mode is available, but shields applications from the underlying details.

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