You would think that banning that would have been more sensible. Unnecessarily dangerous when they knew it existed. One thing doing it during the day, but very different at 3am in the rain.
I dunno. It's odd they blanket ban roads but in this case just noted it as a risk. I can barely walk in my midfoot shoes at the best of times but I've crawled up and down worse shit than that so if it wasn't banned and saved time I'd have done it.
You can use part of it but it involves carrying your bike down some shitty ladder thing at a viaduct: https://twitter.com/quixoticgeek/status/1554575923781029889