How Mirrors Could Solve our Energy Problem

This directly brings to mind nights in central Texas, where I live.  For a good chunk of the year in and around summertime, the roads get heated up so much that they can't cool down overnight due to the sustained heat overnight.  When you step outside in the morning, even before the sun rises, it's still so hot that it can make you sweat, in the low 90s (F) many mornings, and stepping out onto the still-hot road makes the sweat really pour out and is sometimes even hot enough to be uncomfortable to stand on barefoot.  I know that places like Phoenix, AZ get even hotter than our part of the world, but the nights in deserts tend to be cooler, so I don't know if it's the same for them there, not to mention the lower humidity.  I'd love to use and store thermal power from neighborhood roads around here; I think it would transform our energy needs.  We'd need localized facilities, of course, but the more localized they were the smaller they could be, and now with the new Iron-Air battery designs (which I saw on Just Have A Think), we could be rounding the corner to a new age, especially in hot, poor parts of the world.