The Uber Technologies Inc. application is displayed on an Apple Inc. iPhone 5s and iPad Air in this arranged photograph in Washington, D.C., U.S., on Wednesday, March 5, 2014. Uber, a startup that lets drivers pick up passengers with their personal cars and that was valued at $3.5 billion in a funding round last year, has raised $307 million from a group of backers that include Google Ventures, Google Inc.'s investment arm, and Jeff Bezos, the founder of Amazon. Photographer: Andrew Harrer/Bloomberg via Getty Images