It looks like a financial experiment. They are going to see what can be done by the "public" for $1,000,000. The DOD or their contractors probably can't do it for less than about $500,000,000. The car and the refueling should be simple enough, but the data on where to go and what speed could get a bit tricky. It looks like they do allow input from GPS. The trickiest part is that the vehicle would have to be programmed for the course. This means that it cannot just be pre-ran and logged. However, they will reveal the check points "well in advance" of the event. All it would take is a computer wiz, an expert on data acquisition, GPS, proximity and position sensing, wireless communications, and a good vehicle. Hmmm...
<font color=orange>The best ideas are the ones that look obvious to the casual observer.</font color=orange>