With all the hype around the US based solar roadway startup, its exciting to see that this concept is getting some traction (albeit in the Netherlands). As best as I can tell, this is not affiliated with the well-publicized US company. The real pervading concern with this is cost - it is one expensive proof of concept project. But I do like that the Dutch are being ambitious.
The pilot road of just a hundred metres consists of concrete modules each of 2.5 by 3.5 metres. Solar cells are fitted in one travelling direction underneath a tempered glass top layer which is approximately 1-cm thick. There are no solar cells on the other side of the road and this is used to test various top layers. In time, the solar power from the road will be used for practical applications in street lighting, traffic systems, electric cars (which drive on the surface) and households.