Robot meets robot in 'Darpa city' race

One of the trickiest points in the challenge, a four-way stop in an old housing area of the former George Air Force Base. Here, the bots had to figure out which car had the right of way before making right or left turns. The team from UCF, pictured to the right at the stop sign, was stuck for several minutes trying to figure out what to do next. Meanwhile, the robots from Stanford, MIT and CMU navigated the intersection without trouble.