Uber, the world’s most valuable startup, with a $68 billion valuation, has rushed to be first-to-market with driverless technology. The company showed off its self-driving cars at a media event in Pittsburgh last month before putting four Ford Fusions into service for a small group of local riders. It plans to add 100 Volvo SUVs to the fleet by the end of this year. Uber is betting on truly autonomous vehicles to transform the economics of ride-hailing by eliminating its biggest cost—drivers. The company lost at least $1.2 billion in the first half of 2016, Bloomberg reported in August, with the majority of that spent on driver subsidies.