Lane departure warning system - LDW
A lane departure warning system is a type of ADAS, designed to warn the driver when the vehicle begins to move out of its lane, unless a turning signal is on at that time, in that direction. This safety system is designed to minimize accidents caused especially by driver error, distractions and drowsiness.
There are two main types of Lane departure warning systems:
LDW - Lane Departure Warning, which warn the driver if the vehicle is leaving its existing lane using, visual, audible, and/or vibration warnings.
LKS - Lane Keeping Systems, which warn the driver as for LDW above, but much more pro active, automatically steering the car back in to place ensure it stays in its lane.
The first production LDW was developed by Iteris, for Mercedes Actros trucks, back in 2000, and is now available on most trucks sold in Europe.
LDW and LKS normally gain their data from:
Video sensors, mounted behind the windshield, usually beside or on the rear mirror)
Laser sensors, usually externally on the front of the vehicle)
Infrared sensors, which can be mounted behind the windscreen or externally (underneath) the vehicle.