While this isn't the first time we've heard about Uber's prototype -- it was spotted cruising the city's streets by the Pittsburgh Business Times last year -- it is the first time the company has publicly shared news of its plans. In a blog post, Uber says that the development of its self-driving technology will mean "less congestion, more affordable and accessible transportation, and far fewer lives lost in car accidents."

Uber has already gained permission from local authorities to test its car and will use the road miles to ensure it can deal with pedestrians, cyclists and other drivers. It thinks Pittsburgh's streets will also provide the right environment for its vehicle to learn from, with its differing road types, traffic models and weather conditions. It also helps that Carnegie Mellon is on the doorstep, allowing the company to gather experience from engineers who have already built advanced autonomous robots and Mars rovers.

The end game, it appears, is to be one of the first to market with a fleet of for-hire vehicles. General Motors will invest $500 million in Lyft to help beat Uber to the punch and Google is forging ahead with the development of its own driverless car with the idea to spin the business off into an autonomous taxi service. Each entrant needs thousands of road miles before their vehicles are ready to take passengers, suggesting you'll see many more driverless prototypes in the wild in the months ahead.