Michael Laris and Ashley Halsey III:

California regulators have proposed banning the word “autopilot” from electric-car pioneer Tesla’s advertising, teeing up an extraordinary conflict between state officials and the Silicon Valley powerhouse in an era of increasingly automated cars.
 
 The move, in draft state regulations on autonomous cars released late Friday, marks an affront to Tesla’s ambitions and self-image. And it represents a muscular exertion of state power as state and federal officials are working through how they should govern vehicles that soon may require no human driver at all. Some of the state proposals are in line with the wishes of manufacturers; others, far from it.