I dunno, to me it sounded like an interesting experiment. Experiments sometimes go well, sometimes they fail.

Not so sure why you compare it to the solar roads tho, it's not that the solar panels have to sustain the weight of the train, since they are going to be between the rails. Of course there are a tone of things that can go wrong. One thing for example that made me wonder - and it is not addressed in this article - is in relation to the vibrations of the rails. Solar panels don't respond well to vibrations, at all. But, they also mention that the initial test went well and they got the permits to test them for spring of 2025. Let's see?