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Volkswagen Subsidiary Showcases Car That Communicates With Traffic Lights

A project led by SEAT, in collaboration with the Spanish Traffic Authority, the Barcelona City Council and ETRA, successfully connects vehicles with traffic lights and the traffic-control center so drivers can anticipate their upcoming status.

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“What color will the next traffic light be if I continue to drive at this speed?” The answer to this question no longer depends on driver intuition, but rather on technology.

A project led by SEAT, in collaboration with the Spanish Traffic Authority, the Barcelona City Council and ETRA, successfully connects vehicles with traffic lights and the traffic-control center so drivers can anticipate their upcoming status.

The project also enables information on motorway incidents to get sent directly to vehicles without the need for information panels, bringing cars and infrastructure together via the cloud using cellular technology with latency times of 300 milliseconds, according to SEAT

The vehicle used in this pilot project is equipped with the necessary technology to connect with its surroundings and receive information uploaded by the Traffic Authority to the cloud, which in turn enables the driver to anticipate what lies ahead in real time.

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“In this project, SEAT’s new connected cars receive real-time traffic information from the Traffic Authority’s central cloud, including information displayed on motorway panels or the traffic light status in cities,” explains Jordi Caus, the head of urban mobility concepts at SEAT, which is part of the Volkswagen Group.

One part of the project consists of linking cars with traffic lights.

“The traffic light sends a signal to the Traffic Authority’s cloud about its current status and when it is going to change,” Caus says. “The car receives this information, interprets it and alerts the driver of its upcoming status depending on driving speed. This is useful if it is about to change to red, as drivers can begin to decelerate before reaching the traffic light.”

When a vehicle is approaching a traffic light, an alert appears on the screen showing whether it will be red, green or yellow when it arrives, as the system performs a calculation based on how far away the car is and the speed it is travelling at. One important note for safety is that it only works as long as the vehicle is not exceeding the speed limit. On the contrary, the system will no longer alert the driver.

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“The system does not work at higher speeds, which is very important for road safety,” explains Manuel Valdés, the head of mobility and infrastructures at the Barcelona City Council. “It aims to be an auxiliary tool that enables motorists to drive more smoothly.”

Today there are 2,000 information panels that provide drivers with traffic and weather conditions or information about road work or accidents. With this system, all of this information is displayed directly on the screens of connected vehicles at any point of the road network. According to Jorge, “We can accomplish the same as what we used to do with variable message signs on the motorway, but now directly to the car from any point on the road.”

Safety and driving efficiency are the central objectives of the project.

“We are aiming for a significant reduction in the number of accidents, less vehicle traffic and therefore, a positive effect on the environment,” says Jorge Ordás, deputy director of mobility and technology at the Spanish Traffic Authority.

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