So on our last European trip when DS was still an inside baby, we were making our way to CDG via Metro and RER. We made it to Gare du Nord but due to an emergency on the line, the station and entire line was shut down. We were told to take buses but those never appeared so we ended up cab-sharing. If C had been on the outside though, obviously this wouldn't have been an option. I've re-played this situation so many times in my mind and can't figure out what I would do if a similar situation happened again and he was with us. Does anyone have any thoughts? I know this might vary by country, but I'm such a planner, I just like to figure out all of my options.