The rule aims to address the rise in traffic fatalities. It would mandate the use of advanced systems that can automatically stop and avoid hitting pedestrians and stationary or slow-moving vehicles

The agency is proposing that all light vehicles, including cars, large pickup trucks and sport utility vehicles, be equipped to automatically stop and avoid hitting pedestrians at speeds of up to 37 miles per hour.

Vehicles would need to brake and stop to avoid hitting stopped or slow-moving vehicles at speeds of up to 62 m.p.h. And the systems would have to perform at night. About 90 per cent of the new vehicles on sale now have some form of automatic emergency braking, but not all meet the standards the safety agency is proposing.

Automatic emergency braking systems typically use cameras, radar or both to spot vehicles, pedestrians, cyclists, and other obstacles. By comparing a vehicle's speed and direction with those of other vehicles or people, these systems can determine that a collision is imminent, alert the driver through an alarm and activate the brakes if the driver fails to do so