The dark-colored vehicle could be seen shooting across Highway 1, near Gray Whale Cove, in Half Moon Bay, California, and then disappearing from view.

Americans are increasingly into the idea of letting their cars do the driving.

A video filmed by Camillia Bourgeois, the sister of a 27-year-old who was killed in a car crash involving a semitruck on Highway 74 last year, shows a semitruck heading up the highway before 5 a.m ...

According to Ashok Elluswamy, a Tesla engineer, the car drove 72 miles per hour on a Texas highway. Musk said it was the first time a self-driving car drove on the highway, but that's not quite right.