I have three lift bridges, hinged in the same manner as per Swav's comments. One additional fact that I determined, using the Gargraves Phantom tin plate track, the cut ends of the track segments on the lift deck and adjacent stationary track are slightly flexible left to right.
Using clear silicone, I applied clear silicone to both the inside and outside sides (webs) joint of each rail and the last wood tie on the lift bridges and adjacent stationary track wood ties using a small flat screwdriver, the silicone was worked into the web-tie joint both sides and a slight bevel left on the outside 90 degree corner of the rail web and top of tie.
This eliminated noticeable gauge gaping at the rail end crossover joints and should also prevent longitudinal walking of the individual rails in the wood ties and possible binding in opening the lift bridge.
