It is late 1949 and a L1 is moving a work train out to a bridge that needs repair. Pennsy structural engineers determined the 38 year old wood bridge needed additional support before it can be used again, and the work is expected to last several weeks. The work train has only one bunk car as most of the workers will be saying at a nearby Pennsy-owned boarding house, the last remaining "hotel" of the many hotels the Pennsy owned along their right of way in the early 1900s. The L1, Pennsy's primary freight hauler when it first came out in 1914, lasted until the end of steam.
The L1 is 3rd Rail, the tool/bunk/kitchen cars are Lionel, the gondola is Weaver, and the crain is MTH.