Sun-Ways actually went ahead and installed Solar Freakin’ RAILways in the Swiss village of Buttes at the cost of US$700,000 !
References:
https://www.swissinfo.ch/eng/climate-change/switzerland-turns-train-tracks-into-solar-power-plants/89227914
https://www.swissinfo.ch/eng/science/swiss-solar-railway-project-gets-back-on-track/87707181
https://www.startupticker.ch/en/news/sun-ways-opens-world-s-first-rail-ready-track-mounted-solar-power-plant
https://www.youtube.com/@sun-ways
https://www.pv-magazine.com/2024/04/09/italian-startup-testing-pv-sleepers-on-railway-line/
https://pvwatts.nrel.gov/pvwatts.php
Paper on railway dust:
https://www.sciencedirect.com/science/article/pii/S004896971401451X?via%3Dihub
https://pubmed.ncbi.nlm.nih.gov/25461038/
Forum: https://www.eevblog.com/forum/blog/eevblog-1683-sun-ways-solar-freakin-railways-part-2/
Part 1: https://www.youtube.com/watch?v=7vItnxhWRqw
Podcast: Download