China has joined the ranks of the Netherlands, France, and the United States by launching its first "solar highway." This innovative road system replaces traditional asphalt with solar panels, turning roads and parking lots into power-generating surfaces. Beyond transportation, these roads can provide electricity, and in the future, they may even enable instant charging for electric vehicles.
The Jinan South Ring Expressway is set to become the world's first expressway to incorporate photovoltaic road technology. By the end of 2017, the project was under construction and had already connected to a charging station, allowing for grid-connected power generation. According to a report by CCTV, the solar road can support both small electric vehicles and medium-sized trucks, with no significant difference in driving conditions compared to regular asphalt roads.
Developed using "bearer-type photovoltaic pavement technology," the solar road surface is made of "transparent concrete" that has been reinforced for strength and anti-slip properties. It not only meets traffic requirements but also offers features like electrothermal conversion for snow melting. The project spans about 2 kilometers and is being developed by Qilu Transportation Development Group, a state-owned enterprise based in Shandong Province.
The project’s potential is immense. For example, an emergency parking lot covering over 26 million square meters could generate up to 6.217 billion kilowatt-hours annually, providing significant economic and environmental benefits. The project also includes electric vehicle charging stations and smart guidance systems, making it the first fully functional solar road in China.
Looking ahead, the company plans to integrate technologies like electric vehicles, big data, and autonomous driving to explore new applications for solar highways. These advancements could lead to nationwide mobile solar charging stations or smarter, safer roads for driverless vehicles.
The concept of solar roads was first introduced in the U.S., with SolarRoadways emerging as a key player. In 2014, the company proposed a nationwide solar road network. Later, in 2016, they partnered with Missouri’s Department of Transportation to install hexagonal solar panels on a section of Route 66. Their design allows rainwater to drain quickly, supports heavy loads, and includes LED lighting and heating elements to prevent ice buildup.
In France, the world’s first solar road opened in Tulpure in 2016. Funded by the French government, the project generates enough energy to power a small town of 5,000 people. Meanwhile, the Netherlands pioneered the idea with the SolaRoad, a 70-meter-long solar cycle path built in 2009, later expanded to 100 meters in 2016.
As countries around the world continue to experiment with this groundbreaking technology, the vision of solar roads becoming a common feature of modern infrastructure grows ever closer.
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