The blockchain pilot program being tested by Ford is aimed at improving fuel efficiency.

On October 15, the auto-giant said it will use blockchain technology to monitor and automatically implement fuel-efficient driving modes for a fleet of vehicles in Cologne, Germany as a part of a wider pilot program also happening in London and Valencia, Spain.

In collaboration with the City of Cologne, Ford outfitted 10 plug-in hybrid electric vehicles with cellular modems that enable geofencing. As the vehicles enter low-emission zones, they will automatically switch to electric-drive.

The metadata, such as when the vehicle enters or exits a zone as well as the miles-driven, will be recorded to a blockchain.

The pilot addresses the issues municipal authorities face in administering and implementing low-emissions zones by transmitting data to officials in real-time.

“Security, trust and transparency of emissions data are of paramount importance to all stakeholders in this project, and are key for our vision of cleaner air in the city,” said Gunnar Herrmann, chairman of the management board, Ford-Werke GmbH.

The pilot is part of SmartCity Cologne, a collaborative program to promote climate protection and energy transition.

This story originally appeared on Coindesk…