The 2012 GMC Terrain is putting downward pressure on the price of camera-based forward collision detection and lane departure systems. The new $295 option buys customers a system that reduces the complexity of the setups carried by zooty luxury brands by using a single camera instead of the hybrid camera-laser-radar systems you'll find elsewhere. The GMC system employs a camera for both collision warning and lane departure functions, relying on software to detect vehicles. Successive video frames are analyzed to determine the trajectory and time to collision unless corrections are made.
Autoblog, GMC Terrain to get novel single-camera collision alert system
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