Editing Signal passed at danger (section)

== Prevention ==

=== Automatic train protection ===
[[Automatic train protection]] (ATP) is an advanced form of train stop which can regulate the speed of trains in  situations other than at a signal set at danger. ATP can supervise speed restrictions and distance to danger points. It can also take into account  individual train characteristics such as brake performance etc. Therefore ATP can determine when brakes should be applied in order to stop the train before passing a signal at danger. Presently, In the UK, only a small percentage of trains ([[Great Western Railway (train operating company)|Great Western Railway]] and [[Chiltern Railways]]) are fitted with this equipment.

=== Driver's reminder appliance ===
The [[driver's reminder appliance]] (DRA) is an inhibiting switch located on the driver's desk of United Kingdom passenger trains designed specifically to prevent "[[#Signal passed at danger in the United Kingdom; Terminology and procedures|starting away SPADs]]". The driver is required to operate the DRA whenever the train is brought to a stand,<ref name="DfT Rail Electrification">{{cite web
 |title       = Online Rulebook – Module TW1 – Section 10.3
 |url         = http://www.rgsonline.co.uk/Rule_Book/Rule%20Book%20Modules/TW%20-%20Train%20Working/GERT8000-TW1%20Iss%208.pdf
 |publisher   = RSSB
 |access-date  = 16 May 2010
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20110929162822/http://www.rgsonline.co.uk/Rule_Book/Rule%20Book%20Modules/TW%20-%20Train%20Working/GERT8000-TW1%20Iss%208.pdf
 |archive-date = 29 September 2011
}}</ref> either after passing a signal displaying caution or at a signal displaying danger.

Once applied, the DRA displays a red light and prevents traction power from being taken until the DRA is manually cancelled by the driver.