In message , Mike Bristow
writes
Because they are "If you brake /now/ then this is the number of cars
that will be at the platform when you stop".

No they're not. Not on the Picc at least, they indicate how many cars
you are out so that you know whether to brake or not. They are all the
same distance apart and the 6 car mark is exactly a train length out of
the platform.

Other lines may vary but I don't think they do as that's what's in our
training.

The spacing can therefore be affected by the gradient (and the gap
between '4' and '5' is smaller than the gap between '1' and '2' because
the train will be going faster).

--
Steve Fitzgerald has now left the building.
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