Tech firms, automakers split over going fast or slow on driverless cars

Tech companies, automakers and suppliers agree on the potential benefits of self-driving cars, but they diverge on how to make and deploy them. While many in Silicon Valley rush to get autonomous vehicles on the road, traditional automakers in Detroit and elsewhere are taking a more deliberate approach. Which approach will carry the day is still in question. “It’s fascinating to watch,” said Karl Brauer, executive publisher of Kelley Blue Book.