Buffers

Buffers are devices to prevent engines from going past the end of a physical section of track.

Buffers can occasionally break if an engine goes to fast and crashes into them. Thomas once damaged his front by charging towards the buffers while showing off his race with Bertie to Jinty (Oliver in the TV series). Percy also broke two different buffers, one of which led him into a pile of coal. He also collected a new set of buffers as part of the good luck package for Mrs. Kyndley.

Sometimes, if a siding has no buffers for the line to end on, serious accidents will occur, such as when Thomas crashed into a stationmasters house when the siding he was on had no buffers to stop him.