Major automakers and the U.S. government have reached agreement to make automatic emergency braking standard equipment on most cars by 2022, two people briefed on the deal said. The agreement will be announced Thursday by automakers and the National Highway Traffic Safety Administration. Automakers will phase in the equipment on nearly all models except some with older electronic capabilities and some with manual transmissions, said the people, who spoke on condition of anonymity because terms of the agreement haven’t been announced. Automatic emergency braking uses cameras, radar and other sensors to see objects in the way and slow or stop...