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Audi says traffic light information system production ready; potential for 15% reduction in CO2 emissions

Audi says that its Online traffic light information system, demonstrated in an Audi A6 as part of a technology display at the Consumer Electronics Show in January in Las Vegas, is production ready and could be fitted to every Audi model in the range subject to the necessary government legislation.

Audi Online traffic light information uses in-car internet in a new way via Audi connect to establish a link between the car and the traffic light network via the central traffic computer in each town or city. It quickly assimilates the automated traffic light change sequences in the vicinity, and on the approach to a set of lights the Driver Information System (DIS) located in the central instrument cluster then shows the driver the speed to select in order to pass through the light during a green phase. It also displays a visual aid using red, amber or green icons.

Audi Online traffic light information could reduce CO2 emissions by up to 15%, the company says. Click to enlarge.

If the driver is already waiting at a red light, Audi connect will calculate and count down the time remaining until the next green light is scheduled to appear via a timer on the DIS. The system also interacts with the car’s Start-Stop function to ensure the engine is switched on five seconds before the green phase.

Audi AG calculates that Online traffic light interaction has the potential to reduce CO2 emissions by up to 15%.

Testing of the system continues in Las Vegas with 50 sets of traffic lights. Testing is also underway in the northern Italian city of Verona, where some 60 traffic lights covering almost the entire city center are involved, and in Berlin, where 25 Audi customers are driving cars fitted with Online traffic information that can link up to a total of 1,000 traffic lights in the city. Audi is currently analyzing market launch in the United States.



It sounds like a lot of trouble if you have to do it city by city- it requires too much interaction between the car and the lights and light control system.

You would be better off with regenerative braking, possibly using supercaps as well as a battery to do it.

I also had an idea where the traffic lights modulate the signal (assuming they are led lights) and tell the cars how long before they go red (or amber).

Thus, you could prepare to brake, or start slowing down in advance.

william g irwin

It is difficult and expensive, but very beneficial to drivers, for a CITY to interconnect/syncronize the traffic light timing/sequence. The signal timing can be aimed at the speed limit. So much fuel and time is wasted by stop and go at almost every signal light in your path.

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