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- Q611627 subject Q8758530.
- Q611627 abstract "A breather switch, expansion joint, or adjustment switch is an intentional gap in railway tracks to allow for expansion in long sections of otherwise unbroken rail. They are placed between very long sections of continuous welded rail (CWR) or at the transition between CWR and jointed track, and commonly in the vicinity of bridges and viaducts where the infrastructure and track may expand at different rates.The mating sections are tapered diagonally (unlike a butt joint between two lengths of rail), allowing smoother transitions and higher speeds across the gap.Breather switches have two advantages over jointed track: they eliminate the small gap between the rails, eliminating or significantly reducing the noise and vibration caused by passing trains, and, where CWR is particularly prone to expansion, they act as relief points to ensure that track does not warp out of shape or cause a sun kink.".
- Q611627 thumbnail NYCSub_ExpJoint.jpg?width=300.
- Q611627 wikiPageWikiLink Q1432868.
- Q611627 wikiPageWikiLink Q160342.
- Q611627 wikiPageWikiLink Q181348.
- Q611627 wikiPageWikiLink Q5002767.
- Q611627 wikiPageWikiLink Q693104.
- Q611627 wikiPageWikiLink Q870.
- Q611627 wikiPageWikiLink Q8758530.
- Q611627 type Thing.
- Q611627 comment "A breather switch, expansion joint, or adjustment switch is an intentional gap in railway tracks to allow for expansion in long sections of otherwise unbroken rail.".
- Q611627 label "Breather switch".
- Q611627 seeAlso Q1432868.
- Q611627 depiction NYCSub_ExpJoint.jpg.