Starting this fall, San Francisco will begin a trial involving wireless parking sensors in 6,000 of its 24,000 metered spaces, enabling antsy drivers to be alerted via street signs or cell phones when a spot becomes available. Only one problem -- give 50 anxious motorists the same message that a single spot is unoccupied, and you've just created a bona fide mess. Though it'd probably be fun to watch from the sidelines, wouldn't you agree.
