Two years after Uber paid $680 million to buy the self-driving truck startup Otto, the company is folding that effort. In this photo from 2016, an Otto engineer sits behind the steering wheel of a self-driving, big-rig truck during a demonstration in San Francisco.

Two years after Uber paid $680 million to buy the self-driving truck startup Otto, the company is folding that effort. In this photo from 2016, an Otto engineer sits behind the steering wheel of a self-driving, big-rig truck during a demonstration in San Francisco