Section 8: Overrun Prevention and Mitigation
(Page 4 of 6)
At some stations where a signal is situated at the end of the platform, signs have been provided to remind the driver to check the aspect displayed by the signal before departing [8.57 - 8.62]. These signs may be positioned at each of the car stop markers, at DOO monitors/mirrors, or alongside the signal concerned.
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[8.57] "Check Signal Aspect" Sign.
Area: Southern
Usage: High
Status: Uncertain
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[8.58] "Check Signal Aspect" Sign.
Area: South Eastern Trains
Usage: Medium
Status: Uncertain
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[8.59] "Re-Check Signal!" Sign.
Area: South West Trains
Usage: Medium
Status: Uncertain
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[8.60] "Re-Check Signal Aspect" Sign.
Area: Great Western Zone
Usage: Medium
Status: Uncertain
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[8.61] "Re-Check Signal Aspect" Sign.
Area: East Anglia Zone
Usage: Medium
Status: Uncertain
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[8.62] "Check Signal" Sign.
Area: Arriva Trains Wales
Usage: Low
Status: Historical
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Some new countdown markers installed on the Southern Zone in 2000 stated the distance to the relevant station or signal in red text [8.63 & 8.64], instead of having the usual red diagonal bars (see [8.21]).
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[8.63] Countdown Markers ( (a) - Outer board; (b) - Intermediate board; (c) - Inner board ).
Area: Southern Zone
Usage: Low
Status: Uncertain
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[8.64] Countdown Markers.
Area: Southern and Great Western Zones
Usage: Low
Status: Uncertain
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Signal WM717, located at the exit from the Down Side Carriage Shed at London Euston, was commissioned during resignalling of the station in July 2000. Shortly after the signal was brought into use, a board was installed five metres on approach to it, bearing the legend "obey WM717" above a left-hand arrow [8.65].
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[8.65] "Obey WM717" Sign.
Area: London Euston
Usage: Low
Status: Historical
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In September 2000, a signal distance information board was provided at Dunfermline Queen Margaret station (Scotland Zone), stating the distance to the next signal ahead [8.66]. A similar board was provided at Dunfermline Town station, referring to signal EO714.
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[8.66] Signal Distance Information Board.
Area: Scotland Zone
Usage: Low
Status: Obsolescent
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A signal distance information board was erected at Ashtead station, alongside the DOO mirror at the south end of the Down platform, bearing the rather wordy message "your next signal W477 is 420 metres ahead of this point" in blue text [8.67].
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[8.67] Signal Distance Information Board.
Area: Ashtead
Usage: Low
Status: Historical
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The first signal encountered after leaving Oxford station and heading north on the Down Main line was signal OX26, which had restricted sighting. In November 2000, a very large sign worded "OX26 ahead" was applied to the overbridge on the approach to the signal [8.68]. At a later date, a similar sign reading "OX76 ahead" was placed immediately to the left of the original sign, OX76 being the corresponding signal on the Down Passenger Loop. Both signs were obliterated in 2018 when the Oxford area was resignalled.
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[8.68] Signal Reminder Sign.
Area: Oxford
Usage: Low
Status: Historical
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Line reminder signs with a blue and white surround were fitted on both sides of the signal gantries between London Waterloo and Vauxhall, to clearly identify the Down Windsor Fast line [8.69].
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[8.69] Line Reminder Signs with blue and white striped surrounds ( (a) - fitted on front side of gantry; (b) - fitted on rear side of gantry ).
Area: London Waterloo - Vauxhall
Usage: Low
Status: Historical
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Despite the provision of mitigation measures (see [8.51 & 8.52]), a further SPAD incident occurred at signal T22 at Norwood Junction on 20 October 2000. In the following month, the original countdown markers were replaced by new ones that had blue and white edging and stated the signal number [8.70]. The original yellow line reminder sign alongside the signal head (see [8.52]) was replaced by one with a white background and blue and white edging [8.71]. The countdown markers were removed in 2016.
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[8.70] Countdown Markers with blue and white striped surrounds ( (a) - Outer board; (b) - Intermediate board; (c) - Inner board ).
Area: Norwood Junction
Usage: Low
Status: Historical
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[8.71] Line Reminder Sign with blue and white striped surround.
Area: Norwood Junction
Usage: Low
Status: Historical
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By 2000, new signal distance information boards being provided on the Midlands Zone had a blue and white surround [8.72] in place of the previous red border (see [8.55]). The newer style of board was also adopted by the Great Western Zone, some being installed on the Great Western Main Line in the manner of countdown markers at distances of 300 yards (274 metres), 200 yards (183 metres) and 100 yards (91 metres) to the signal concerned.
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[8.72] Signal Distance Information Board.
Area: Midlands and Great Western Zones
Usage: Medium
Status: Uncertain
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The signal at the north end of Harrow & Wealdstone station on the DC electrified line, number WS55, was another multi-SPAD signal. Mitigating measures included the associated position light signal controlling movements into the reversing siding being fitted with a large surround, which has black and white striped edges [8.73]. In addition, a sign worded "check signal" (see [8.40]) was fitted to the post of the platform car stop marker.
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[8.73] Position light signal with black and white striped surround.
Area: Harrow & Wealdstone
Usage: Low
Status: Uncertain
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