Yaw damper (railroad)

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Yaw damper between cars of an E259 series EMU operated by JR East in Japan, June 2009

A yaw damper is a transverse mounted shock absorber used to prevent railcars and locomotives from swaying excessively from side to side. Yaw dampers prevent locomotives and passenger railcars from striking station platforms as they roll past them and reduce the gap that must be left between the railroad vehicle and the platform.[1]

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