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== History ==
[[File: Mile_Post_2.jpg |thumb|150px|right|Milepost at Highley Signal Box]]
A [[Gradient profile and mileages#Milepost|milepost]] is situated at the foot of Highley Signal Boxsignal box, showing that the location is exactly 143¼ miles from Paddington. The flat area of land which the box occupies was formerly the site of a stone quarry for which a [[Stone quarry siding opposite Highley Station|private siding]] was provided in 1880 but which closed within a year. In August 1882 the GWR Board approved the provision of additional sidings and the signal box, which were commissioned on 25 June 1883.<ref name=JM>[[Bibliography#Books|Marshall (1989)]] p. 99.</ref>
<ref name="SRSSignalBoxRegister_Update9">Signal Box Register, Volume 1: Great Western, revised 2011 edition, Signalling Record Society (plus correction sheet #9 )</ref> The box has not changed significantly since that time, with the exception of modifications to the interlocking of the lever frame.
The interior was used for filming in 1974 of the atmospheric TV film [[The Signalman]], starring Denholm Elliot and closely following Dickens' work of the same title. It also featured in an episode of [[Survivors]].
== Operation and Equipment equipment ==
=== Lever Frame frame ===
Highley retains its original 14 lever McKenzie and Holland 1873 patent lever frame, with 11 working levers, 3 spare, and no spaces. The interlocking was replaced with GWR 5-bar vertical tappet interlocking in 1947. <ref name="SRSSignalBoxRegister_Update9" />
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=== Block Sections sections ===
The box works in both directions using Electric Token Block regulations, and is fitted with four Tyer's No. 9 token instruments. In the Up direction, Highley works to either [[Arley signal box|Arley]] (short section), or [[Bewdley North signal box|Bewdley North]] (long section) when Arley box is switched out. The Highley-Bewdley North long section token unlocks Arley signal box so it may operate as a ground frame, allowing for access to the yard when that box is switched out. An intermediate token instrument is provided to allow trains to be locked in. In the Down direction, the section is to [[Hampton Loade signal box|Hampton Loade]] (short section), or [[Bridgnorth signal box|Bridgnorth]] (long section) when Hampton Loade is switched out. The Highley-Bridgnorth long section token unlocks a 2-lever ground frame at [[Eardington]], allowing access to the siding located there. Although passenger services cannot cross at Highley, Highley box itself cannot be switched out when these are operating.
The down starting signal is a rare GWR concrete post signal, as used fairly extensively on the Cambrian Coast line, and the down fixed distant is a standard GWR wooden post design, otherwise all signals are of late GWR/BR(W) steel tubular post and enamel arm design.
== Levers & lever frames == {| class="wikitable"! style="text-align:left;" | No. !! style="text-align:left;" | Colour !! style="text-align:left;" | Description !! style="text-align:left;" | Lever Sequence|-| 1 || White || Spare || |-| 2 || Red || Up Main Home || 4|-| 3 || Red with white band || Up Main Starting || |-| 4 || Blue || FPL for 5 |||- | 5 || Black || Up Main Facing / To No. 1 Siding |||-| 6 || White || Spare || |-| 7 || Red with white band || Down Disc for 5 || 5|-| 8 || Red with white band || Up Disc for 10 || 10|-| 9 || White || Spare |||-| 10 || Black || Down Main Facing / To No. 1 Siding || Nil or 11|-| 11 || Blue || FPL to 10 || Nil or 10|-| 12 || Red with white stripe || Down Main Starting |||-| 13 || Red || Down Main Home || 11|-| 14 || Red || Down Disc to No. 1 Siding Home || 10 11 |} ==Models==The box has been [[Models of the Severn Valley Railway | modelled]] by both [http://www.rmweb.co.uk/community/index.php?/topic/73-bachmann-scenecraft-highley-signal-box/ Bachmann] and [https://peco-uk.com/products/gwr-signal-box?_pos=1&_sid=5077f29b1&_ss=r Ratio]. == See Also also ==
*[[List of signal boxes]]
