Google's Self-Driving Car

Google's project was kept secret until now. Seven cars were equipped with the system outlined above. Cars have gone about 1600 km without any help from man, and about 384000 km with minimum intervention. Even if the project itself was secret, tests were conducted in public on the streets of California.

Our automated cars use video cameras, radar sensors and a laser range finder to “see” other traffic, as well as detailed maps (which we collect using manually driven vehicles) to navigate the road ahead. This is all made possible by Google’s data centers, which can process the enormous amounts of information gathered by our cars when mapping their terrain.
-GoogleBlog