Skip to main content

Audi taught cars to talk to traffic lights, and they’re set to be even chattier

Audi A7 Autonomous traffic light
Image used with permission by copyright holder

Las Vegas thrives on gambling, but Audi introduced a feature in 2016 that took much of the guesswork out of driving down the Strip. For the first time, motorists in compatible cars could tell exactly when a traffic light was about to turn green. They could bet the house on it.

Called traffic light information, the feature quickly outgrew the confines of Sin City. In early 2018, it was compatible with about 1,000 intersections across the United States. That number ballooned to nearly 4,700 during the year, and the company predicts the technology will expand faster in the coming years as its engineers and the growing list of smart cities it’s working with learn more about it. But while it sounds reasonably simple, getting cars to talk to traffic lights requires state-of-the-art hardware, advanced software, and a tremendous amount of data.

“One of the future enhancements we could think of right now is factoring traffic light information into the navigation.”

“Some of the signal controller systems are managed at the local level, while some are managed by the state’s department of transportation,” Balaji Yelchuru, Audi’s connectivity senior strategist, told Digital Trends. “Signal controllers typically last 25 to 50 years. Not all of them have the ability to be connected to the cloud,” he added. Luckily for Audi, many cities in the United States are willing to invest in updating their signal controller systems so that they can communicate with each other, and with internet-connected cars.

Once a communication channel is established, the traffic lights share basic information Audi calls signal timing plans with compatible cars via a 4G connection as they approach an intersection. In a nutshell, the car learns how long each light stays red for, when it turned red, and when it will turn green. This information is received in real time. Drivers waiting at an intersection know precisely when a light will turn green, and the green light optimized speed advisory (GLOSA) feature tells them the speed they need to travel at to catch the next green light. Everything is displayed in the car’s digital instrument cluster (called Virtual Cockpit in Audi-speak), and in the head-up display. Audi placed it there (rather than, say, in the touchscreen) to minimize potential distractions.

Audi A8 traffic drama shot
Andy Boxall/Digital Trends

Generating accurate location data is key; motorists don’t care whether a light four miles away is green, red, or purple. Sharing a car’s real-time location with city officials raises obvious privacy concerns, but Yelchuru stressed drivers have nothing to worry about. “We don’t use personalized data. It’s purely anonymous, so we just know a car is approaching this point at this speed. We don’t know the name of the owner, or the car’s VIN number.”

Our streets will get a lot chattier in the not-too-distant future. Looking ahead, traffic light information technology and GLOSA could communicate directly with the car’s stop-start system to tell it when to shut down the engine and when to start it, and it could also help the navigation system find the quickest route from A to B.

As of February 2019, Audi’s traffic light information technology works in the 13 metropolitan areas.

“One of the future enhancements we could think of right now is factoring traffic light information into the navigation. We know the signal delays on a given route, so we can optimize the route to minimize them. It could have a huge impact in cities like Washington D.C., where you have a lot of signals. It could have a huge impact on the overall travel time,” Yelchuru explained.

5G could make it faster, too, but the traffic light information feature is fully compatible with existing technologies. It doesn’t need a super-fast connection that lets cars exchange information with the infrastructure five or 10 times per second. That’s a boon for cities, because it keeps the cost of upgrades in check.

As of February 2019, Audi’s traffic light information technology works in the 13 metropolitan areas scattered across United States. The list includes New York City, Denver, Dallas, Portland, and Phoenix. The firm’s main focus is to expand it to new areas in America, but it’s also looking abroad. “We’re planning a roll-out in Canada. There is a road map for a global launch in other cities, including some parts of Europe,” Yelchuru affirmed.

Ronan Glon
Ronan Glon is an American automotive and tech journalist based in southern France. As a long-time contributor to Digital…
Tesla and Elon Musk sued over use of AI image at Cybercab event
tesla and spacex CEO elon musk stylized image

Tesla’s recent We, Robot presentation has run into trouble, with one of the production companies behind Blade Runner 2049 suing Tesla and its CEO, Elon Musk, for alleged copyright infringement.

Tesla used the glitzy October 10 event to unveil its Cybercab and Robovan, and also to showcase the latest version of its Optimus humanoid robot.

Read more
Qualcomm wants to power your next car with the Snapdragon Cockpit and Ride Elite platforms
Qualcomm Snapdragon Cockpit Elite and Ride Elite automotive platforms

It’s been a big year for Qualcomm. Alongside its massive launch into laptop chips through the Snapdragon X Elite series, Qualcomm is now entering the automotive space. The company has announced the new Qualcomm Snapdragon Cockpit Elite and Snapdragon Ride Elite platforms at its annual Snapdragon Summit, which it flew me out to attend.

The two platforms are designed for different purposes, and can be used togetheror separately. The Snapdragon Cockpit Elite is built for in-vehicle infotainment systems and services, while the Snapdragon Ride Elite is built to power autonomous vehicle systems, including all the cameras and sensors that go into those systems.

Read more
Scout Traveler and Scout Terra forge a new path for EVs
Scout Traveler and Scout Terra.

Electric vehicles are inseparable from newness, whether it’s new tech, new designs, or new companies like Rivian, Lucid, and Tesla. But the Volkswagen Group’s new EV-only brand also relies heavily on the past.

Unveiled Thursday, the Scout Traveler electric SUV and Scout Terra electric pickup truck are modern interpretations of the classic International Harvester Scout. Manufactured from 1961 to 1980, the original Scout helped popularize the idea of the rugged, off-road-capable utility vehicle, setting the stage for modern SUVs.

Read more