Autonomous driving on highways with everybody going in the same direction, and no crossing traffic is quite doable, and should be commercially available soon, Pratt said. People who think that the car business will be disrupted by self-driving Uber pods, however, will require decades of patience. Pratt sees self-driving cars in inner cities only if there are special lanes, along with guarantees that there “are no rogue human driven cars to screw things up.” These lanes would basically turn cars into “a road train.” Once robots and humans mix on the roads, matters will get hairy. Says Pratt: