| 4206 and the wire train in the S&I facility, on track 2. At this point, it is interesting to note the aluminum upside-down U-shaped guard rails on either side and spanning the length of the upper platform. All are relatively light and removable. Why so many instead of just two very long ones? The working height of the upper platform (relative to top of rail) is roughly what you would expect to find at a passenger station. When a train set enters the building, it doesn't necessarily stop at the same point all the time. After the train stops, the passenger doors open and the blue flags are lit. The cleaners remove (lift up) whatever individual guard rail is directly opposite an open passenger door, set it aside, enter the train, do their thing, exit the train and restore the guard rail. Pretty simple, huh? |