A city about 25 kilometers from Amsterdam in The Netherlands called Krommenie is the installation site for the first solar bike path in the world. The bike path is able to produce enough green electricity to power three homes. It’s not exactly a long path, it spans 70 meters (~229 feet) and will be extended to 100 meters (~328 feet) by 2016.
The SolaRoad bike path is made of rectangular concrete slabs that have solar panels on top covered in a sheet of glass an inch thick. That sheet of glass is strong enough to support the weight of a truck. While it is able to capture solar energy, it is still 30% less effective than roof-mounted solar panels would be. This is because the roof-mounted panels can be aligned with the sun.
The solar bike path will open to the public on November 12 and cost €1.5 million (~$1.87 million USD) so far with final costs being somewhere in the €3 million(~$3.75 million USD) range.