[drabiega]

How is the presence of asphalt underneath an issue? The deciding factor will be whether the marginal cost of a solar path over an asphalt path will be greater or less than building an equivalent solar facility. That seems like it could go either way.

[IkmoIkmo]

Very good point. Plus even if the marginal cost is lower than a dedicated solar facility, we don't necessarily have that luxury. We do if we want just 5% sustainable energy, not a problem. But if we want 99% sustainable energy, surface area is a very tricky challenge [0] and so it'd be a matter of the one and the other, instead of the one or the other.

[0] https://www.youtube.com/watch?v=GFosQtEqzSE