Applied Information, together with Audi and HAAS, have used Cellular Vehicle-to-Everything (C-V2X) technology to request a green light for passenger vehicles. This ‘detector call’ application was developed by Applied Information for the Texas Department of Transportation (TxDOT) and demonstrated using the TravelSafely smartphone app, an Audi e-tron Sportback equipped with C-V2X Direct, and a cellular network-connected RAM pickup truck using HAAS Alert’s Safety Cloud technology.

The application is designed to improve safety by eliminating unnecessary stops at cross streets at night, while reducing the costs associated with installing and maintaining advanced vehicle detection equipment such as radar, cameras, and loops embedded in the pavement. It works by mimicking a normal request for a green light from vehicles approaching the traffic signal and changes the light as the vehicle arrives. Eliminating unnecessary stops in this way helps reduce idle times, providing an environmental benefit. Applied Information confirmed that its application is non-disruptive and maintains the signal’s normal timing routine.

The technology enabling the passenger vehicles and TravelSafely to communicate with the signals, and call for the green light using C-V2X, was developed by Applied Information. The Audi e-tron was equipped with a C-V2X Direct on-board unit which was programmed to ask for the green light. The RAM pickup truck used its integrated cellular network modem to communicate with HAAS Alert’s Safety Cloud platform, which then delivered the location data to Applied Information’s cloud platform to ask for the green light.