DARPA Grand Challenge (2004)

Team Caltech's autonomous vehicle at the March 8–12 qualification, inspection, and demonstration (QID) event at the California Speedway. Team Caltech qualified and was selected to start third in the challenge.[3]

Prior to the main event in the Mojave Desert, the twenty-one qualifying teams were required to navigate a mile-long obstacle course at California Speedway.[4] Seven teams were able to successfully complete the entire course, while eight others completed enough of it to satisfy of the judges, resulting in fifteen vehicles in the final race.[4]

Unfortunately, the failures during the preliminary tests were indicative of how the vehicles would perform on the actual course. Two of the fifteen vehicles had to be withdrawn before the final race began[5] and one car flipped upside down in the starting area and had to be withdrawn.[5] Three hours into the event that was scheduled to last ten hours, only four vehicles remained operational. The vehicles suffered from a variety of mechanical problems, including "stuck brakes, broken axles, rollovers, and malfunctioning satellite navigation equipment."[6]

Within a few hours, all of the vehicles in the challenge had suffered critical vehicle failures, had been disqualified, or had withdrawn. The farthest any of the teams got was the Red Team's 7.4 miles (11.9 km), less than 5% off the full length of the course. Their vehicle, Sandstorm, went off-course in a hairpin turn and got stuck on the embankment.[1] The next farthest vehicles were those of the SciAutonics II Team, which traversed 6.7 miles (10.8 km) before becoming stuck on an embankment;[1] Team DAD (Digital Auto Drive), which drove 6.0 miles (9.7 km) before getting stuck on a rock;[1] and the Golem Group, which made it 5.2 miles (8.4 km) before becoming trapped on a steep hill.[1]

Team ENSCO's vehicle, DAVID

Although the initial race was deemed a failure, as no vehicles achieved anything close to the goal, DARPA was committed to running the challenge for as long as Congressional authority allowed (which would have been until 2007, but the goal was reached in 2005). The first Grand Challenge is considered by some to be a success, mainly because it spurred interest and innovation.[1]

In addition to the difficulty many vehicles had with the harsh terrain, many initial designs also struggled to handle both sensing upcoming obstacles and following the GPS waypoints simultaneously. DARPA Grand Challenge deputy program manager Tom Strat said, "some of the vehicles were able to follow the GPS waypoints very accurately; but were not able to sense obstacles ahead....Other vehicles were very good at sensing obstacles, but had difficulty following waypoints or were scared of their own shadow, hallucinating obstacles when they weren't there."[2]

Several teams returned the next year, learning from the 2004 event and updating their designs.[2]