I think I've been on trains in Japan (albeit not in Tokyo) where the first two cars didn't fit on the platform, and passengers were alerted to switch cars if ge

I think I've been on trains in Japan (albeit not in Tokyo) where the first two cars didn't fit on the platform, and passengers were alerted to switch cars if getting off at that station. Not sure how well it'd work given commuter congestion, but it warrants some consideration.