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SSP019 Iss 1

Approach Locking

Synopsis

The purpose of approach locking is to prevent the change of route ahead if a signal once the driver has seen a proceed aspect at the signal or has seen an aspect at a previous signal that would indicate to him that the former signal is displaying a proceed aspect. Provision must, however, be made for such locking to be released provided a reasonable assurance can be given that any movement, the driver of which has sighted a proceed aspect, will in the event of the signal being replaced to danger, either have come to a stand at the signal or will have run past the signal onto the track circuits which lock the points or level crossing.
Read full standard
Registered
Withdrawn
Other
Issued:
01/07/1992
Published:
01/07/1992
In Force:
01/08/1992
Withdrawn:
07/04/1997

Details

Under Consultation Closed
Vehicle Assessment No
Supersedes SSP019 02-91
Superseded By GKRT0063 Iss 1
Lead Committee Control Command and Signalling - CCS
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