Point granted, we use asphalt because it's a cheap and I should know better. I would still expect it to last longer than wildly complicated solar panel/computer/light displays that have many more modes of failure.
For this to work you have to do several things to the glass at the same time, none of which come easy: make it strong, make it hard (probably need to get to 8 or 9 on Moh's hardness scale), make it tough, and have it grip rubber as well as asphalt does even when it's wet. Considering scratch resistant and grippy compete with eachother this is not looking hopeful.
Yea, I don't think this is a good idea yet. However, train tracks might be a good option if you could get it durable enough but where having traction issues. The ~1m distance between rails is generally just wasted space and the US has ~400,000 miles of rail if say 20% efficiency over 1/2 of that distance that's ~320GWh per day which is a fair bit of power.
The advantage being rail lines need to trainsport electricity for electric trains, so you get dual use from those power lines.
That's still bundling something fragile with infrastructure that carries heavy machinery. Transporting electricity is a solved problem, we can put a solar farm in the middle of nowhere with current technology. And if we're looking for land that's already owned we could put solar cells underneath long range transmission lines 1000x easier than we could embed them in roads or in train tracks.
For this to work you have to do several things to the glass at the same time, none of which come easy: make it strong, make it hard (probably need to get to 8 or 9 on Moh's hardness scale), make it tough, and have it grip rubber as well as asphalt does even when it's wet. Considering scratch resistant and grippy compete with eachother this is not looking hopeful.