Police said at least one vehicle was traveling at 119 mph when it hit the victims' vehicle.
The plant, to be built on land being readied for industrial development about 100 miles west of Detroit, would start making batteries in 2026.
Ford is already developing electric vehicles like the Ford GT, Mustang Mach-E SUV and F-150 Lightning pickup and it operates an EV division in China.
Ford says it will nearly double the annual production of its electric F-150 Lightning pickup truck based on a high number of advance reservations.
The iconic car is celebrating its 57th birthday on Saturday, April 17.
The system uses hyper-accurate maps, GPS, cameras and sensors to steer a car precisely in the center of a lane and control its speed in traffic.
Ford’s electric future officially begins on November 17.
Ford is calling the Mustang the most powerful factory-built, street-legal Ford ever, with its 760 horsepower V8 engine.