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Section 8: Over-run Prevention and Mitigation

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Some signal reminder boards installed on the East Anglia Zone from 2001 have included the words "falling gradient" or "steep falling gradient" on their supplementary signs to assist drivers who are braking to stop at the signals concerned [8.73].

[8.73] Signal Reminder Board on Falling Gradient.
Area: East Anglia Zone   Usage: Low   Status: Obsolescent

Signal W187 on the Down Slow line at Wimbledon is the first signal beyond the flyover that carries the Up Slow line over the Fast lines. Approaching from the north, the Down lines are separated by the Up Slow, but beyond the flyover they run adjacent to each other. On occasions, drivers running on the Down Slow had been misled into reading the Down Fast signal adjacent to W187. In May 2001, as a short term remedy, line reminder signs with a letter "S" [8.74] were erected on the approach to signal W187 and adjacent to the signal itself.

[8.74] Line Reminder Sign with blue and white striped surround.
Area: Wimbledon   Usage: Low   Status: Historical

In May 2001, two countdown markers were provided on the approach to signal T365 at Wivelsfield (Southern Zone), stating the distance to the signal and embellished with blue and white surrounds [8.75].

[8.75] Countdown Markers ( (a) - Outer board; (b) - Inner board ).
Area: Wivelsfield   Usage: Low   Status: Uncertain

A signal distance information board similar to the usual Midlands Zone pattern (see [8.70]) but elongated and enlarged [8.76] was installed on the approach to Up Slow signal WM312 at Camden Junction in June 2001. The distance was given in metres rather than yards.

[8.76] Signal Distance Information Board.
Area: Camden Junction   Usage: Low   Status: Uncertain

An alternative form of signal reminder board on the Great Western Zone comprises an inverted triangle bearing a small exclamation mark with the associated lettering underneath [8.77].

[8.77] Signal Reminder Board (e.g. refers to signal number W305).
Area: Great Western Zone   Usage: Low   Status: Obsolescent

The countdown markers installed on the approach to signal VC636 at Balham (Southern Region) in 2001 stated the signal number at the top of each board [8.78].

[8.78] Countdown Markers ( (a) - Outer board; (b) - Intermediate board; (c) - Inner board ).
Area: Balham   Usage: Low   Status: Historical

Further countdown markers installed on the Southern Region in 2002 stated the distance to the signal or station concerned, either in yards [8.79] or fractions of a mile [8.80].

[8.79] Countdown Markers ( (a) - Outer board; (b) - Intermediate board; (c) - Inner board ).
Area: Southern Region   Usage: Low   Status: Uncertain
[8.80] Countdown Markers ( (a) - Outer board; (b) - Intermediate board; (c) - Inner board ).
Area: Southern Region   Usage: Low   Status: Uncertain

A report into Railtrack's management of multi-SPAD signals was published by the Health & Safety Executive in 2002. The report made comment on the disparate practices adopted by the various Railtrack Zones regarding the provision and format of signal reminder boards and stated that boards with a white background and red border are more visually arresting than those with a yellow background, as well as being apparently less affected by dirt. Late in 2002, most of the signal reminder boards installed on the Scotland Zone during the preceding three years, which had yellow backgrounds (see [8.51 & 8.52]), were replaced by boards with a white background and red border [8.81 & 8.82].

[8.81] Signal Reminder Board.
Area: Scotland Zone   Usage: Low   Status: Obsolescent
[8.82] Signal Reminder Board. Click Here for Photo
Area: Scotland Zone   Usage: Low   Status: Obsolescent

In 2003, a standard form of signal reminder board was introduced, with a white background and red border. The supplementary sign, which also has a red border, states the distance to the signal ahead as well as its number [8.83].

[8.83] Signal Reminder Board.
Area: All Areas   Usage: Medium   Status: Current

Since 2003, it has been permissible to install up to a maximum of six countdown markers on the approach to a single feature. The red diagonal bars are grouped in sets of no more than three. It also became a standard requirement for each countdown marker to include the identity of the signal or other feature it applies to [8.84].

[8.84] Countdown Markers.
Area: All Areas   Usage: Medium   Status: Current

The standard form of line reminder board, introduced in 2003, comprises a white rectangle with a black border and black characters [8.85].

[8.85] Line Reminder Board (e.g. "DA" = Down Ayr line). Click Here for Photo
Area: All Areas   Usage: Medium   Status: Current