• The road, inspired by electric train lines, cost Germany's Environment Ministry 14 million euros from Siemens and is under testing until 2022.
  • Conductor rods attached to a truck's roofs connect with 670-Volt overhead cables, which charge the trucks as they drive along.
  • Germany also spent 70 million euros developing a truck, which Siemens say will save $22,000 in fuel per 62,100 miles.
  • Germany's Transport Ministry have said up to 80% of Germany's truck traffic may soon become electrified in an effort to curb emissions.
  • Siemens also trialed the eHighway in Carson, Los Angeles, in November 2017.
  • Visit Business Insider's homepage for more stories.

Germany has opened its first ever section of "eHighway," which allows hybrid cargo trucks to charge their batteries while they are on the move.

On Tuesday, the German government introduced the technology on a six-mile-long stretch of Autobahn near the city of Frankfurt. It uses 670-volt direct-current overhead cables which let electric trucks draw down power and recharge their batteries on the go.

The program, called ELISA (electrified innovative heavy traffic on the Autobahn), is an environment ministry-sponsored project involving electronics giant Siemens and authorities from the state of Hesse, where it is taking place.

Truck ehighway germany rods

The trucks which have conductor rods called pantographs added to the top of the cabin must be going less than 56 miles per hour to successfully make a connection.

Read more: 10 cities where buying an electric car may not be worth it

When they're connected they run on electricity alone. When they rejoin the normal highway they switch back to their hybrid engines.

ehighway infografik en ger

Siemens says the technology will save a 40-ton truck 20,000 euros ($22,000) in fuel costs over 62,100 miles.

It also noted that if a driver swerved to the left or right while connected to the cables it would not detach.

The 6-mile stretch of the A5 Autobahn will be tested until 2022, after which a decision will be made on whether or not to expand the project, which has so far cost the government a total 14 million euros.

Germany also spent 70 million euros ($77 million) with Scania and Volkswagen to make a special hybrid truck for the track.

This video from Siemens shows how the project is intended to connect sea ports with cities using the trucks and the eHighway.

Germany's transport ministry recently published a study saying 80% of Germany's truck traffic could soon become electrified, according to Deutsche Welle.

Read more: 32 electric cars you'll see on the road by 2025

Two more eHighway tracks are already being built. One in the northern region of Schleswig-Holstein, the other in Baden-Wrttemberg, in Germany's southwest.

Germany says it wants to cut greenhouse gas emissions by 40% by 2020, by 55% by 2030, and up to 95% by 2050, compared to 1990 levels.

Siemens also trialed the eHighway in Carson, Los Angeles, in November 2017.

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