Great explanation, thank you for that. Obviously a DS wouldn’t be able to tell a crew to rest in an engine due to there not being a suitable space. I guess I was thinking more about this CS stuck train situation in particular. Let’s suppose a replacement crew was able to be transported in (helicopter, van gets in but they're not sure another one could get in, National Guard, etc.), so instead of bringing the previous crew out, they were assigned rooms (similar to a bunk car), the train isn’t moving so noise shouldn’t be an issue. I would think then the crew would be able to get a rest period in. Just a thought, and all in all this situation probably won’t be replicated for years, if ever.There is a very fine line that comes into play. In an emergency, a crew that hasn't reached their designated terminal can receive a 4 hour respite providing there is suitable food and lodging. Suitable lodging typically means providing sleeping quarters. Otherwise, the railroads could tell a freight crew to sleep on the engine on a siding and that would count as rest. The problem is sleeping quarters typically must be free from interruptions caused by noise under the control of the railroad. Typically, a train in transit wouldn't fit that bill.