South Korea built an eco-friendly bike lane connecting Daejeon to Sejong, the administrative capital of South Korea, in 2014. The 32 km stretch lane is covered with solar roof panels, which not only generate electricity but also protect cyclists from sun and rain on the highway. With 7,502 solar panels installed at intervals of approximately 30 inches, the panelling covers 3 miles of the 5.5-mile cycling highway. It can produce an annual average of 2,200 MWh of eco-friendly electricity that powers many of the streetlights and electronic displays in Sejong.