Transit Test Track - TTT

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The Transit Test Track (TTT) is a 9.1-mile oval track, equipped with a third rail power system, used for vehicle performance and specification compliance testing. Investigation of vehicle performance is possible at speeds up to 80 miles per hour over six segments of different track material construction; e.g., continuous welded rail versus jointed rail, wood versus concrete ties.

The third rail DC electrified power system provides transit and commuter vehicles with a voltage variable from zero to 1,000 volts DC with a 3,700 amp continuous rating. The track includes a 10,000-foot-long overhead DC contact wire catenary, suitable for low-speed operation and evaluation of light rail urban vehicles.

Located within the transit loop is the tight-turn or "screech loop." This 150-foot radius B 38 degree, 12 minute B curve test track is used in the investigation of wheel noise, car curving performance, and suspension system stability.

Controlled tests for verification of specification compliance of vehicle performance including spin/slide, propulsion and braking performance evaluation have been performed for numerous transit properties, such as Massachusetts Bay Transit Authority, Maryland Transit Authority, LA County Red Line System, Dade County Transportation Administration, and New Jersey Transit Authority (NJTA).