In this Monday, March 30, 2015 photo provided by Delphi Corp., the company's autonomous car approaches New York City, its final destination of a 3,400-mile road trip across the U.S., near Jersey City, N.J. Ninety-nine percent of the time, the car steered itself; only in very tricky situations, like a construction zone, did drivers take control. Now engineers will take the reams of data from the trip and use it to further advance autonomous technology.