Solar highway: China's built a road so smart it will be able to charge car

The road to China’s autonomous-driving future is paved with solar panels, mapping sensors and electric-battery rechargers as the nation tests an “intelligent highway” that could speed the transformation of the global transportation industry.

The technologies will be embedded underneath transparent concrete used to build a 1,080-meter-long stretch of road in the eastern city of Jinan. About 45,000 vehicles barrel over the section every day, and the solar panels inside generate enough electricity to power highway lights and 800 homes, according to builder Qilu Transportation Development Group Co.

Yet Qilu Transportation wants to do more than supply juice to the grid: it wants the road to be just as smart as the vehicles of the future. The government says 10 per cent of all cars should be fully self-driving by 2030, and Qilu considers that an opportunity to deliver better traffic updates, accurate mapping and on-the-go recharging of electric-vehicle batteries — all from the ground up.

“The highways we have been using can only carry vehicles passing by, and they are like the 1.0-generation product,” said Zhou Yong, the company’s general manager. “We’re working on the 2.0 and 3.0 generations by transplanting brains and a nervous system.”

The construction comes as President Xi Jinping’s government pushes ahead with a “Made in China 2025” plan to help the nation become an advanced manufacturing power and not just a supplier of sneakers, clothes and toys for export. The 10 sectors highlighted include new-energy vehicles, information technology and robotics.

China also has a separate plan for developing its artificial-intelligence industry that calls for the nation to be the world’s primary AI innovation center by 2030.

Part of that effort involves building what the government calls an intelligent transportation system. Coordinating the development of autonomous-driving cars and intelligent-road systems is a focus, said Yuan Peng, the deputy head of the transportation ministry’s science and technology department.

“The ministry will help offer smart roads for the smart cars that are coming,” Yuan said.

Step one makes up a section of the expressway surrounding Jinan, an old industrial hub of about 7 million people that’s home to China National Heavy Duty Truck Group, which is also known as Sinotruk and includes Volkswagen AG’s MAN SE as a minority shareholder. Zhejiang Geely Holding Group also has a plant there making Geely brand cars.

The road has three vertical layers, with the shell of see-through material allowing sunlight to reach the solar cells underneath. The top layer also has space inside to thread recharging wires and sensors that monitor temperature, traffic flow and weight load.

The solar panels spread across two lanes, which feel no different to a driver than the regular road, and are thinner than a 1-yuan coin standing on its edge. The test road is too short to deliver wireless recharging at the moment, Zhou said.

“From the angle of the technology itself, charging is not a problem,” Zhou said. “The vehicles that can be charged wirelessly aren’t used on roads yet.”

Qilu Transportation didn’t give a time frame for installing the sensors to transmit data and power to EV batteries. The road has an estimated life span of 15 years, matching that of traditional asphalt highways.