You can check out ricochet at
http://www.ricochet.com
(there you go lens, now ricochet won't be left out)
It's not quite yet available here in Phoenix yet but when it is you can bet I am getting it! Slated for realease soon out here...
As I understand it they are attaching transmitters to traffic signals all over the place. And get this, they claim you can use the service while travelling up to 70 mph!
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Get some traffic -
Hardcore Free
Sex Starved
Lesi TGP