Its figures, collected from U.S. auto insurers, show that cars with forward collision warning systems, which either warn the driver about an impending crash or apply the brakes automatically, are involved in far fewer crashes than cars without them.
The Mercedes and Lexus systems warn the driver, with a warning light and audible signal, when it is time to intervene.
For the cooperative emergency braking warning system, the system will warn the driver if the deceleration of neighbouring cars is great and the driving direction is the same (same lane or neighbouring lane).
Lane departure warning systems that monitor vehicle position and warn the driver if the vehicle wanders.
The agency also dismissed Ford's argument that a warning light would be enough to warn the driver of a problem.
Troops used a flashlight and three flares to try to warn the driver.
"Soldiers fired in front of the vehicle to warn the driver to stop.
Just what this system would do to warn the driver is not yet clear.
Zhang called D3115 to warn the driver that, because of the faulty signal, his train might shut down automatically.
If it believes that a pedestrian is about to step in front of the car, it will warn the driver.
A traffic jam within the construction site results in a dangerous situation that the system has to identify in order to warn the driver.
