Editing Dead man's switch (section)

===Train===
In most trains, a basic level of protection is provided by a "dead man's handle" or pedal. If the driver is taken ill and releases this, the power will be shut off and an [[Emergency brake (train)|emergency brake]] application will be initiated to stop the train.

More recent safety standards do not consider this to be adequate, as the driver may slump over the dead man's handle and continue to hold it down even though they are not capable of controlling the train. Modern trains overcome this risk with the addition of a '''vigilance system'''<ref name="DSD ">{{cite web |title=DSD Vigilance Unit |url=http://www.arrowvale.co.uk/images/stories/rail/brochures/DSD_Vigilance_Unit.pdf |access-date=2017-08-17 |date=2010 }}{{Dead link|date=May 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> to the dead man's system. A buzzer or bell sounds every minute or so in order to alert the motorman or engineer. If they do not respond by moving a controller, or releasing and then re-applying the dead man's handle, the system will automatically initiate an emergency brake application. Most major rail systems in the world use this equipment, both in their freight and passenger operations. It is also used on the [[R143 (New York City Subway car)|R143]] and other New York City Subway cars while under [[communications-based train control|CBTC]] operation. In the US, older locomotives produced before 1995 did not originally carry this feature, but given the modular nature of the system it is not uncommon to find them retrofitted.{{Citation needed|date=September 2023}}