Two years ago, General Motors presented a vision for the future that involved 'zero crashes, zero traffic, and zero emissions.' Today, that future seems further away than ever.

The automaker’s driverless car subsidiary, Cruise, announced last night the resignation of Kyle Vogt as CEO. The decision came over a month after an incident in which a hit-and-run victim became pinned under a Cruise vehicle and then was dragged 20 feet to the side of the road. As a result, California Department of Motor Vehicles suspended Cruise’s permit to operate driverless cars in the state.

The company subsequently paused driverless operations nationwide, appointed a new chief safety officer, recalled all 950 of its vehicles, and retained an outside group...