NR SSI8003-78
SSI Data Preparation - Consecutive Double Yellow Aspect Sequences (aka RT/SSI/8003-78)
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| Organization: | NR |
| Publication Date: | 1 February 2002 |
| Status: | active |
| Page Count: | 14 |
scope:
General
This document covers sequences of two or more consecutive double yellow aspects. Both isolated sequences and overlapping sequences are covered, in Sections 3 and 4 respectively.
An overlapping sequence occurs wherever a signal's double yellow aspect is the final double yellow in one sequence but not in another. This can be recognised from the aspect sequencing section of the signal's control tables if signals other than the one immediately ahead are referred to.
Document History
NR SSI8003-78
February 1, 2002
SSI Data Preparation - Consecutive Double Yellow Aspect Sequences (aka RT/SSI/8003-78)
General
This document covers sequences of two or more consecutive double yellow aspects. Both isolated sequences and overlapping sequences are covered, in Sections 3 and 4 respectively.
An...
References
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