Places   (Help with places, streets and buildings in Wigan.)

Yes, but they did not need to rig for bi directional working of each line. Even on race days, the conventionally use line is appropriately signalled. Only the line in counter-directional use has these particular signalling requirements, and then only briefly on race days.

I would imagine that as the bi-directional use is for such a brief period, they would not admit (ie signal check) any traffic from entering from spurs, exchange sidings or links.

Having said that, I do not know. Perhaps it was signalled for each track to have bi-directional working, and I had never observed that it was so. Maybe someone who knows the signalling of the route will come on and tell us.