Please see this train derailment report in Canada from 2004. Hot Box Detectors worked perfectly. The procedure was not fulfilled properly causing tens of thousand of dollars in undue expenses for the Company and risking lives of several.

Railway Investigation report

 What could be done to alleviate such mishandling of procedures ? Evaluating a critical element as the temperature of a roller bearing with hands is inappropriate There should be ways to prevent that. Is there ? Any comments ?