Lead unit of the Rail Explorers pedal their "speeder" past an S4 of Delaware & Hudson heritage (ex D&H 3036) on what looks to be a fun activity. Five such contraptions followed.
EMD leader on 003. The boxcar marked Do Not Hump is an Autonomous Track Assessment Car
(ATAC), 994373 is one of several such cars using lasers to check track on the fly.