Uber CEO Dara Khosrowshahi has driven a delivery car to find out why the company is having trouble attracting more drivers. He was surprised to discover the scale of the problems facing drivers and customers.

The results of the experiment prompted Uber to develop delivery orders, to allow drivers to see drop-off locations before pickup, and to give drivers rewards. The CEO said he received a 5-star rating for nearly 100 delivery trips he completed across the city. He said he tried to keep customers happy by providing them with charging cables and creating playlists on Spotify.