I agree.

This addresses one of two main failure modes of solar roadways (grippy coating disintegrating from being driven over), but keeps another one (contamination).

Note that this particular trail was right next to a terminus of very lightly used branch, served by well-maintained rolling stock.

Should one install this anywhere with large traffic of older locomotives, panels will quickly get covered in dark goo from oil drip+dust, reducing output dramatically.

Apparently they just stick a brush on the caboose to clean them