a system to decrease turnaround time at terminal stations where a second driver enters the rear cab of an arriving train and departs driving the train from that end while the first driver is walking the length of the platform ready to take over the subsequent departure
If you step back and think about a situation, you think about it as if you were not involved in it. I stepped back and analysed the situation It was necessary to step back from the project and look at it as a whole. = stand back