NR/L2/SIG/30009/E450 ISSUE 1
Signalling Principles Handbook – Overlap Proving
inactive
| Organization: | NR |
| Publication Date: | 5 December 2009 |
| Status: | inactive |
| Page Count: | 7 |
scope:
This specification applies to all signalling schemes and track renewals which require the signalling to be amended.
Purpose
This section forms part of the Signalling Principles Handbook (NR/L2/SIG/30009) and is to be read in conjunction with the other modules of the handbook.
This Section details Network Rail's policy on proving points and train detection within an overlap and comprises mandatory sections, statements of best practice (which shall be followed unless an alternative can be demonstrated to be beneficial to the company and no less safe), and guidance on historical practices (which are not to be applied to new works but provide information on previous standards or their interpretation.
Document History
December 2, 2023
Signalling Principles Handbook: Module E450 - Overlaps
This module applies to all changes to signalling where:
a) there are lineside signals; and
b) the changes appreciably alter the overrun risk associated with any of the signals within the scheme....
September 1, 2018
Signalling Principles Handbook: Module E450 - Overlaps - This standard should only be used for reference to ensure 'The Control of Risk' until the compliance date of its replacement standard is reached, upon which this standard will be withdrawn. The development of all new processes and procedures should be to the replacement standard
This module applies to all changes to signalling where:
a) there are lineside signals; and
b) the changes appreciably alter the overrun risk associated with any of the signals within the scheme....
NR/L2/SIG/30009/E450 ISSUE 1
December 5, 2009
Signalling Principles Handbook – Overlap Proving
This specification applies to all signalling schemes and track renewals which require the signalling to be amended.
Purpose
This section forms part of the Signalling Principles Handbook...
References
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