The trick with using cameras to assist drivers is that the cameras have to know what to look for. Lane lines are fairly simple. Some companies are developing systems that can read the numbers on speed limits signs so they can warn you if you're going too fast.
The Benz S-class uses an infrared camera and infrared light source to provide "night vision" capacity. The scene in front of the car is displayed in the center of the dashboard in green-and-black.
Still, all of these are aids to seeing. The driver still makes the final choice about whether to cross a lane marker or exceed the speed limit.
