UM.68: Difference between revisions
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[[File: 1977-05.png|border]] | [[File: 1977-05.png|border]] | ||
==Conversion to four-aspect== | |||
When [[SN.93]] was brought into use over the weekend of 22-24 October 1977, further in connection with the installation of reversible signalling, UM.68 was converted to a four-aspect, as there was the insufficient braking distance between [[SN.89]] and [[SN.93]]. | |||
[[File: 1977-09.png|border]] | |||
The reversible signalling was brought into use in 1981 <ref>Signalling Notice [[31/W/2770]]</ref>. | The reversible signalling was brought into use in 1981 <ref>Signalling Notice [[31/W/2770]]</ref>. | ||
Latest revision as of 13:19, 15 November 2014
Origin
UM.68 was a 3-aspect automatic signal commissioned at Swindon MAS Stage 1 on 14 November 1966[1]. At that stage it was supervised by Uffington SB.
| Previous Signal | Line | Line | Next Signal |
|---|---|---|---|
| UM.69 | Up Main | Up Main | UF.22 |
Supervision passed to Swindon Panel under Swindon MAS Stage 5 on 3rd March 1968.
| Previous Signal | Line | Line | Next Signal |
|---|---|---|---|
| UM.69 | Up Main | Up Main | SN.89 |
Alterations in connection with Reversible Signalling
From 19 June 1977 the signal was mounted on a right-hand cantilever, in readiness for the future installation of SN.693RR on the same structure.
Conversion to four-aspect
When SN.93 was brought into use over the weekend of 22-24 October 1977, further in connection with the installation of reversible signalling, UM.68 was converted to a four-aspect, as there was the insufficient braking distance between SN.89 and SN.93.
The reversible signalling was brought into use in 1981 [2].