The 2012 GMC Terrain SLT. Image: © GM Corp.Enlarge Photo
While radar-based collision detection systems aren’t new, General Motors is the first automaker to debut a simpler, more economical camera-based system. The camera will also provide drivers with a lane departure warning system, and it’s now an affordable option on the 2012 GMC Terrain crossover.
The collision alert system, which operates at speeds above 25 miles per hour, uses a windshield-mounted high resolution digital camera to capture some 14 frames per second. Each frame is analyzed by an image processing algorithm to determine the change in position of objects in view.
If the system detects a car in front, it signals the driver with a green icon; follow too closely, and that green icon changes to a solid red warning bar. Close on a vehicle in front too quickly, and that red bar will flash, an audible alert will sound and the Terrain will pre-charge its braking system to reduce stopping distances.