Wireless Parking

[youtube]http://www.youtube.com/watch?v=yVq9pdam14M

What if sensors on the street knew exactly which parking spots were free? Your phone could direct you straight to a free space and the city could use that real-time information for dynamic meter pricing, discouraging driving when car traffic is too high. San Francisco is already trying the idea. If it works, it will be good for motorists, for the city, and for the environment.