In 2004, the U.S. Department of Defense issued a obstacle: $1 million to the first group of engineers to create an autonomous automobile to race across the Mojave Desert.
Though the prize went unclaimed, the obstacle publicized an notion that the moment belonged to science fiction — the driverless vehicle. It caught the awareness of Google co-founders Sergey Brin and Larry Web site, who convened a group of engineers to buy autos from dealership plenty and retrofit them with off-the-shelf sensors.
But producing the autos travel on their own wasn’t a easy job. At the time, the engineering was new,