Railperf
Established Member
- Joined
- 30 Oct 2017
- Messages
- 2,923
But if the doors and steps were to retract, then the step is usually first to emerge and when it has, the doors then open. Similarly the step does not seem to retract until the doors are closed. So there is no risk the doors open and the step being half out/ retracted.It also prevents, when the doors are opening and closing to maintain temperature, risking the doors being reopened when half-closed by someone attempting to board, finding the step half-retracted and missing their footing. It's the only sensible way to do it really.