crash, 2020 – Salisbury rail crash, 2021 Accidents following a signal passed at danger with authority Whenever a signal is passed at danger the driver is required to "proceed with caution, stop short of any obstructions, and drive at speed that will enable you to stop within the distance which you can see to be clear". Failure to do this has caused the following collisions: – Roseville, 1950 – Stratford (London Underground), 1953 – Coppenhall Junction, 1962 – Wrawby Junction, 1983 – Glenbrook, 1999 – Vittorio Emanuele (Rome Metro), 2006 Accidents where the signaller incorrectly authorised a driver to pass a signal at danger Except where permissive working is in use, interlocking usually prevents a train from being signalled into a section that is already occupied. When operational needs require it, this can be overridden, and provided it is carried out in accordance with the rules this is a safe practice. However, failure to follow protocol can result in a collision: – Nashville, TN, 1918 – Bucerdea, 1968 – Castlecary rail accidents, 1968 – Seer Green, 1981 – Jakarta, 1987 – Zoufftgen, 2006 – Szczekociny, 2012 – Bad Aibling, 2016 See also Ding-ding, and away, British slang for a guard incorrectly giving permission to a driver to start away from a platform against a red signal. References External links Office of Rail Regulation UK Health and Safety Exec, Retrieved 8 March 2006. Railway accidents and incidents