Not only to reduce material costs, but also to provide a good battery of radiant heat so that when winter comes and the sun hits the concrete, the heat builds up and the driveway stays hot longer, which reduces the time you need to use salt or shovel on the driveway. eliminates it.

Tires laid around bridge piers and along river banks can be filled with cement and simply locked together with cement, or reinforced with long rebar driven into the ground through the openings of the tires. It seems to me that this would be a very good method to stop flood damage under bridges. Heated asphalt is completely impractical in almost all cases.