Google’s Waymo, Uber and carmakers GM and Mercedes-Benz are among the companies working to put driverless vehicles in showrooms. That competition also should help lower prices that can reach $75,000 apiece for the sensors that scan a car’s surrounding environment so it knows how to drive itself.

UD Trucks, a Japanese subsidiary of Swedish truck maker Volvo AB, plans to introduce electric and autonomous trucks within the next two years, joining global rivals in developing driverless technologies to ease a labor shortage.