The national highway traffic safety administration wants to require all new passenger cars and light trucks include potentially lifesaving automatic emergency braking and meet stricter safety standards within three years. This is another step toward regulating electronic systems responsible for what drivers usually do on their own. Nets a chief council and Carlson says they want breaks to be effective at much higher speeds. We're also including what we call full collision avoidance. That means that a vehicle has to stop without touching another vehicle in front of it. The systems would allow vehicles to fully avoid other vehicles at up to 50 mph if a driver doesn't react. With this proposal, we could change a high speed crash from a deadly one to a lower speed crash with minor injuries or just property damage. Nietzsche says 90% of new passenger vehicles already include the braking technology. Ed Donahue, Washington.