Several sites are running a story on the solar roadway installation in the Netherlands, including phys.org and IFLScience.
However over at EEV Blog is a thorough critical review by Dave Jones which runs through the numbers and finds it doesn't add up as a practical proposal. There's references to Dave's original review of an earlier proposal, for some background on the calculations.
From the associated forum posting:
Dave shows how to go about doing ballpark engineering feasibility calculations for such a project, calculates the expected payback period, and SPOILER, shows why Solar Roadways will never be a viable technology. This time using real measured data from the Netherlands cycleway prototype, and real measured solar insolation data for the Netherlands
(Score: 0) by Anonymous Coward on Sunday November 09 2014, @12:55PM
...and my life is even shorter, having watched most of it, waiting for him to get to the effing point.