In theory the FCPyF is controlled by a dispatcher, sending train orders via telegraph offices along the route, so lineside signals are not common. However, the junction between the high and low lines has always been protected by a pair of semaphore signals.
These were located on the far side of the Jones River bridges, as shown above, until this afternoon but have been repositioned on the station side of the bridges.
The reason for the move is so that they now act as clear indicators of the changeover locations between the Grande controller and the Rio Paleta and Resurreccion controllers. In the photos above the freight on the high line is standing on track powered by the Rio Paleta controller and the passenger train on the low line is standing on the Resurreccion controller’s track. The tracks beyond the signals in front of both trains are controlled from Grande.
Before any so called signalling experts join in the conversation, the siting of the lower route’s signal on the “wrong” side of the line is so that its light cannot be confused with that of the upper route at night. The two routes converge in both horizontal and vertical planes as they approach the junction, if the low level signal were on the correct side of the track it would be virtually in line with the high level signal when viewed from the mouth of Resurreccion Tunnel.