This is exactly what they did with the G train in brooklyn on the weekends. It's 2 track only, and they would shutdown one side, transfer to the other side at B

This is exactly what they did with the G train in brooklyn on the weekends. It's 2 track only, and they would shutdown one side, transfer to the other side at Bedford-Nostram. Was it a pain in the ass? Yes. Was it way better than no service... absolutely!