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Audi is experimenting with networking cars and traffic systems in order to cut the amount of time drivers spend idling at stoplights. The German automaker claims that its efforts could result in saving 184,920 gallons of fuel per year and slim CO2 emissions by as much as two million tons. The idea is pretty simple – each car is able to communicate with upcoming traffic lights via wireless LAN and UMTS connections. As the vehicle approaches a stoplight that's already red, the light will tel

Audi's stoplight detection system, called Travolution, has been given the go-ahead for expansion in the company's hometown of Ingostadt, Germany. Travolution establishes a connection between a red light and a vehicle, so that as a specially equipped car moves toward a red light at an intersection, stop light gantries fitted with communications modules can let the car know when the light will turn green. The car then lets the driver know what speed he should maintain in order to pass through the