View source for Level Crossing Keep Closed Button

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== Purpose ==
Sometimes it is necessary to keep a [[Level Crossings|level crossing]] closed indefinitely. The DET button is used to close and keep closed a crossing, while the [[Level Crossing Keep Closed Off Button|DELT]] button allows the level crossing to open again.

[[File:DET_DELT.png|200px|thumb|left|Level Crossing Keep Closed Button (on the left)]]

== Operation ==

To keep a level crossing closed press the DET button together with the '''''main''''' button of the level crossing. Notice that both the DET and the [[Level Crossing Keep Closed Off Button|DELT]] button have a yellow dot on them - this indicates that the buttons only work when a level crossing main button is pressed. A main level crossing button is yellow while a secondary level crossing button is grey.