Audi drivers are to be warned of slippery road conditions ahead via updated car-to-x technology.

The system is said to use high-precision data to estimate how much friction a car’s tyres have with the road surface on the basis of wheel slip.

This data, said to be accurate enough to detect the tiniest changes in adhesion, is then used to warn other drivers approaching the area of ice or other slippery conditions in near real-time.

The system is based on technology from Swedish company NIRA Dynamics AB. 

Audi says the system will improve as more cars join the ‘swarm’ intelligence network, whch currently numbers around 1.7 million Volkswagen Group vehicles.

It says wider applications of the tech include sat-navs avoiding potential trouble spots, driver assistance systems pre-conditioning themselves for low-grip conditions, and local authorities using the data to optimise snow clearing and gritting services.

Thomas Muller, head of ADAS and automated driving at VW Group sub-brand Car.Software, said: “The project for improved hazard information is a good example of the great potential of cross-brand software development. 

“Together with other group brands and our strategic partners, we were able to develop a digital service within a few months while making use of our own software skills and economies of scale.

“The improved hazard information service is just the beginning; we see wide-ranging potential for the future.”