WASHINGTON — The government should require automakers to make the latest collision-prevention technologies standard equipment on all new cars and trucks, a move that could reduce fatal highway accidents by more than half, federal accident investigators said Wednesday.

The technologies include lane-departure warning, forward-collision warning, adaptive cruise control, automatic braking, and electronic stability control. They are available on many vehicles already, although some are limited primarily to higher-end models. The National Transportation Safety Board said they should be required on all vehicles, despite the auto industry’s concern that doing so could add thousands of dollars to the cost of a car.