Driving on Glass? Inventor Hopes to Lay Down Solar Roads

What a waste of (my tax dollars) money. If it's not cost effective to put PV's on our rooftops, how can it ever be a good idea to drive on them?

The energy cost of processing glass is not trivial. Certainly much more than bitumus asphalt. Grip is another thing. Anyone who has ridden a motorcycle is keenly aware of the limited traction you get on painted or steel surfaces especially when wet. The practice of adding glass micro-beads to painted lines to improve nightime visibility make them even more treacherous to single-track vehicles.

With the amount of traffic - and non-moving traffic - the road would never see the light of day!