imo, BOTTOM LINE, with this, as with ANY "crowd funded" project, if it were a good, feasible, solid, profitable idea, they would not need to beg for money to get it made. the market would fund it through sales of a good product.
anything that cant sell itself, is not getting bought by big corps (who specialize in making money off of products) or has to be funded by the govt, right off the bat theres your first clue its bullshit.
if there really was money to be made with solar roadways, ge, dupont, sony, samsung, lg, ti, chevron, phillips, ect.... would already be pumping them out.