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Most don't believe there's a positive ROI. Panels need to stay clean. I personally think the business model for these is to get Governments to install them for PR reasons (using public funding).

Let's suppose the solar panels are durable enough for heavy vehicles to drive over, and modular so as to make re/placement reasonable.

There is no way its durable enough to not be scuffed and offers a safe level of grip in all weather conditions, and is transparent enough to offer anything near a normal solar cells efficiency, AND is cheaper than just building a regular road and installing a solar panel that doesn't get driven over.

I also feel like most people here are criticizing without having read the article. It is clearly stated that this will leverage a new technology to protect the photo-voltaic cells and make the panels very resistant to heavy-weight.