Ford Motor Co CEO Mark Fields holds up a new Velodyne LIDAR sensor at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said it will begin using a new, lower cost LiDAR sensor made by California-based Velodyne. The high cost of such sensors, which act as the eyes of a self-driving car, is one of the main technical obstacles to widespread commercialization of self-driving vehicles, industry executives say. REUTERS/Rick Wilking