These ride-sharing services work in basically the same way. They allow drivers, who are independent contractors and not employees of Uber or Lyft, to pick you up when you book a ride in the app.

An curved arrow pointing right. Uber's customers in Pittsburgh are going to get a special treat — they'll be able to hail a self-driving car. But how do they even work? We went to Uber's ...

Uber Technologies UBER0.38%increase ... The ride-hailing leaders are preparing to bring driverless taxis to your door with new app features that allow customers to use their phones to open ...