The Light at the end of the tunnel

While working empty coalie BB35 home today from Port Kembla, and needing to slow the train for the turn-out into the refuge at Coal Cliff, I took the quick opportunity to snap this shot.
There is after all a light at the end of the tunnel. A single colour light type signal. We have the scattered aces (slanted row of three subsidiary yellow lights) to indicate the turn-out plus the route indicator displaying R for the refuge. Scarborough tunnel being single line causes some traffic congestion and we had to enter the refuge at Coal Cliff to allow a couple of interurban passenger trains to pass through. Fortunately, we navigated successfully through this wonky tunnel which threatens to collapse.
Aussie Alco.