Comment Re:EEVBlog debunked this for 5+ projects (Score 1) 177
For just the road surface it doesn't seem reasonable for building a solar cell into the road is ever going to be cheaper on build cost vs a very well established construction technique with no fragile parts, no need for flexible interconnects, salt, the severe abrasion from grit caught in tires of heavy vehicles etc. whilst training to allow light transmission to the active part, serviceability is a whole other problem with need to access panels/interconnects for repair - or enough redundancy to allow for individual parts to fail with the associated reductions in potential output. Remembering that closing a roadway for repair is expensive not just for the direct costs but the indirect costs of those using the roadway. When you add the "roof" over the transitional roadway, could solar in the surface be net cheaper considering all the maintenance costs etc. if it is I'd imagine it would be close.
On the positive side is the energy generated. A roof over the road is likely to produce more output: better angle to the sun, less problems with dirt, no blockage of light from massive amounts of abrasion, no blockage from vehicles travelling on the road (or stopped/parked on the roads), no blockage from road markings, repairs to individual failures are likely to be quicker (no road closure, so less downtime) as well as cheaper considered in the basic costs above.