SN.22: Difference between revisions

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The reversible signalling was brought into use in 1981 <ref>Signalling Notice [[31/2766]]</ref>.
The reversible signalling was brought into use in 1981 <ref>Signalling Notice [[31/2766]]</ref>.
==Capability to flash double yellow==
The signal was given the capability to flash double yellow in May 1988, when the next signal, [[SN.24]], was showing a flashing single yellow, and the following signal [[SN.28]], was cleared towards platform 3.
[[File: 1988-01.png|border]]


==References==
==References==


<references/>
<references/>

Latest revision as of 21:34, 15 November 2014

Back to Control Functions

Origin

...


Alterations in connection with Reversible Signalling

From 6 March 1977 the signal was mounted on a right-hand cantilever, in readiness for the future installation of SN.624R.

1977-03.png

The reversible signalling was brought into use in 1981 [1].

Capability to flash double yellow

The signal was given the capability to flash double yellow in May 1988, when the next signal, SN.24, was showing a flashing single yellow, and the following signal SN.28, was cleared towards platform 3.

1988-01.png


References

  1. Signalling Notice 31/2766