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.
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.
