Railways also come with a lot of extra gubbins beyond the two rails nailed to wood planks (or more often bolted to concrete these days). In more modern networks, rather than burning dinosaurs, the railways have power which comes from all that knitting above the tracks. The above here is the problem. Cos it's going to shade the panels. "But it's only a thin wire, so a small shadow" I can hear some techbro angry typing. You don't need to fully obscure a whole panel to reduce it's output.
4/n
