Lane departure warning system
In road-transport terminology, a lane departure warning system (LDWS) is a mechanism designed to warn the driver when the vehicle begins to move out of its lane on freeways and arterial roads. These systems are designed to minimize accidents by addressing the main causes of collisions: driver error, distractions and drowsiness. In 2009 the U.S. National Highway Traffic Safety Administration (NHTSA) began studying whether to mandate lane departure warning systems and frontal collision warning systems on automobiles.
Roadway with lane markings
An example implementation of the lane-detection algorithm showing Canny edge detection and Hough transform outputs
Lane assist camera of VW Golf
Mobileye's PCB and camera sensor from a Hyundai Lane Guidance camera module
In road transport, a lane is part of a roadway that is designated to be used by a single line of vehicles to control and guide drivers and reduce traffic conflicts. Most public roads (highways) have at least two lanes, one for traffic in each direction, separated by lane markings. On multilane roadways and busier two-lane roads, lanes are designated with road surface markings. Major highways often have two multi-lane roadways separated by a median.
Thru lanes indicated by arrows on California CR G4 (Montague Expressway) in Silicon Valley
An ambulance lane in Warsaw, Poland
The Ontario Highway 401 in the Greater Toronto area, with 17 travel lanes in 6 separate carriageways visible in the midground
Turning lane on the Rodovia BR-101, Brazil