Gap Jumper definition

Gap Jumper means a device used to enable the Traction Supply from an adjacent location to be used by a Train or an Existing Train if the Traction Supply to its collector shoes is unavailable. Gapped means a car whose collector shoes are separated from the Traction Supply. This occurs quite normally when a Train or an Existing Train passes over gaps in the current rails. It is unusual for a car to remain Gapped for more than a few seconds whilst in service. A whole Train or Existing Train can become Gapped if it should run on to a dead section or on to a Shed Road in a depot or outstation. GLA Act means the Greater London Authority Act 1999.
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