Question - Why is there a Car Stop marker on this Viaduct?

[FeatherWing]

I've just recently explored the Holbeck Viaduct in Leeds and upon it, just before the first metal bridge section that curves, right after the Holbeck Depot, I found a 9 Car Stop marker.
This raised a lot of questions for me as you only find these on platforms as they tell a driver where to stop at the station relative to how many carriages are on their train, but there's no platform on this viaduct, not that you could fit one anyways.

The marker is of the style still used today, which tracks since the viaduct was fully abandoned in 1987-88. So I just wanted to ask if anyone here happened to know why it's there as I can't think of any reason for its existance?

 

[Scoobysrt]

I'm no expert on trains but maybe its a pre marker, maybe in those days they had multiple markers incase the driver missed one and it is a sign for a platform after the viaduct.

 

[KPUrban_]

My guess would be for shunting/reversing movements.

 

[GRONK]

Yeah it’s for train “cars” also known as carriages, you see them on station platforms as well. So that one will apply to trains which are 9 carriages long

 

[FeatherWing]

I'm no expert on trains but maybe its a pre marker, maybe in those days they had multiple markers incase the driver missed one and it is a sign for a platform after the viaduct.

Well I can guarantee it wasn't for a platform, since not only is there no way up to the Viaduct from Ground level there, a platform there would be about a foot and a half in depth, so not really viable.

 

[stranton]

was once used as a head shunt for shunting trains in the opposite direction (requiring reversal)