Carnegie Mellon University won the $2 million first place prize in DARPA’s urban robot race this weekend, stealing the thunder from 2005’s Grand Challenge leader, Stanford University. The Defense Advanced Research Projects Agency (DARPA) Urban Challenge awarded a total of $3.5 million in prizes on Sunday, a day after the race. Stanford University took second place, with a $1 million cash prize, and Virginia Tech won $500,000 for third place.

The Urban Challenge was a six-hour test of driverless vehicles on the suburban roads of the former George Air Force Base in Oro Grande, Calif., where the robotic cars were required to complete three missions while obeying traffic laws and avoiding obstacles and collisions with other driverless vehicles. The challenge was the first ever to test robots driving among other robots, and it was significantly harder than DARPA’s 2005 desert Grand Challenge because of that interplay and the urban setting, according to race officials.