Watch this video about new technologies that aid in highway safety on HowStuffWorks. According to the National Highway Traffic Safety Administration, nearly 200,000 car crashes a year happen due to automobiles leaving their lanes. Now, two new safety technologies could serve as an extra set of "eyes" for drivers and help them avoid a collision caused by an inadvertent lane change or by colliding with a vehicle in the side blind spot while changing lanes. See how these new systems may decrease the frequency of lane-changing wrecks in this video from Medialink.