Signaling and Controlling Draw & Lift bridges by Bendorsey/MSGSapper

rcwarner1953

Gandy Dancer
I wanted to signal the SAP_Celilio Draw_Bridge to act like a operating lift bridge. Here is what I did.

The easiest solution is manual. To do so, put signals on both sides of the bridge. Then place an invisible switch between the signal and the bridge on both sides. Open both switches, the bridge has red signals on both sides. The bridge stays open.

When your train approaches the red signal (or stops), close the invisible switch on the train side of the bridge. The signal will still stay red but the bridge will now close. Wait for the bridge to close and then close the invisible switch on the other side of the bridge. The signal holding the train will now go green.

In my route “GLO Great Lakes Route Extended V04” with session “GLIO Run a train Upick”, I used triggers to automate the above. I added signals to protect the bridge and then I added visible remote-control switches that are real life in their function (the train goes into open switch and derails).
To automate; first place a trigger at some distance from the bridge to initialize the opening of both switches. Second, at some place of your choosing, trigger the closing of the derail on the train side of the bridge. I did so about fifty yards from the red signal. This is petty typical of US operations. The bridge operator has to make sure there is no river traffic. By US law, river traffic has the right of way. I wanted to bring the train to a stop and watch the bridge come down. The bridge now comes down. At this point, the second trigger has a wait that covers the bridge closing. Wait complete, the switch on the other side of the bridge closes and the signal goes green.

You can make this work with river traffic by using invisible switches in addition to the ones I made visible.

Note, other solutions are found in forum entry “Signals by lift bridge, dated 8/23/2008”.
 
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