Urban Challenge

SignOnSanDiego has a story about Urban Challenge:

Two-person teams find and race through 12 checkpoints in downtown San Diego using only clues, their feet and public transit. The race begins with a trivia challenge — the sharpest teams leave race headquarters first. There is no set race course. Competitors use their street smarts to navigate San Diego in the quickest possible manner.

See Verizon Wireless Urban Challenge

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