A secret project at Google involves cars with technology to help them to "drive themselves."

It it’s blog post, Google says that its goal is, "to help prevent traffic accidents, free up people’s time and reduce carbon emissions by fundamentally changing car use." The Google cars have reportedly driven more than 140,000 miles with the help of video cameras, radar sensors and a laser range finder to cruise through the traffic.

In the following video shows a car with Street View Car-like spoiler on the top for the navigation assistance.

Another video shows the self-driven Prius from the different angle.