Audi traffic light system saves fuel, helps drivers hit green lights

One of life’s small but satisfying pleasures is hitting the sweet spot while driving across town and catching all the green lights. At the moment, having that happen is a matter of luck, but Audi is developing a system that will make never getting caught by a red light an everyday thing as a way of speeding up traffic while improving fuel efficiency and cutting emissions.

Driving through a string of green lights isn’t a question of gremlins or clean living, but of timing. Modern traffic signals operate on a system of preset timers. Sometimes these change depending on the time of day or, as is increasingly common, because the traffic system reacts to changes in the pattern of car movements. In other words, the trick to an uninterrupted journey is to figure out how the lights are timed at that moment and drive at the right speed, so you always hit the intersections when it’s green.

The Audi system works by taking the guesswork out of the equation. Using Audi connect and the Multi Media Interface (MMI) system, the car uses the internet to contact the area’s central traffic computer and asks it for the automated traffic light sequences. From these, the system calculates the best speed needed to hit as many green lights as possible. This speed, as well as red, green and amber icons, are displayed to the driver via the Driver Information System (DIS) located in the central instrument cluster. If the car is already at a red light, it provides a countdown until green and overrides the start/stop mechanism to bring the engine online five seconds before it’s time to go.

You save time, get to your destination sooner, don’t spend time wasting fuel slowing down and speeding up. All it requires is local legislation and a little cooperation from traffic engineers.

Audi demoed the system in Las Vegas. Now, all it takes is insightful politicians and staff. In the United States, it could be in place in a half-century or so.

One thought on “Audi traffic light system saves fuel, helps drivers hit green lights

  1. drugsandotherthings says:

    Wow. One of those brilliant, “simple”, logical ideas that no one has thought of before. Although somehow I feel this system would probably work far better in Audi’s Germany then in the US…

    (though personally, I’d still rather just have the traffic signal preemption systems that many emergency vehicles have)

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