But can it fly? WITH its successful test of robo-taxis on the streets of Pittsburgh last week, Uber has dominated recent headlines on autonomous vehicles. But behind the scenes three groups—technology giants such as Uber, carmakers and a whole fleet of autoparts suppliers—are in a tight race. Each is vying to develop the hardware and software that make up the complex guts of a self-driving vehicle. A couple of years ago tech firms appeared well ahead in this battle.