Quoted By:
Jouban line question: trains running to/from the chiyoda line face a narrower loading gauge and as such are six inches narrower than standard jr east rolling stock. They run as far east as Toride. Are the platforms at stations between Toride and Ayase (beginning of Chiyoda line trackage) built to the chiyoda line's more restrictive loading gauge? If so, is there anything aside from the dispatcher's and operator's intelligence from stopping a full sized Nippori-bound/originating Jouban line rapid train or full sized MOW equipment from being switched onto the local tracks and plowing into a platform? (tripcocks, onboard electronics, idk?) There are a few track connections by the two yards where this could happen.
Sidenote: I'm seeing Odakyu rolling stock has varying widths starting from the same as chiyoda/jouban local rolling stock, to +2 inches for Romancecar trains which run on the chiyoda line, to +4 inches for trains which only run on odakyu track. I assume they just put up with having a gap at the platforms.
