Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/117

SINGLE CARRIAGEWAY ROADS Relaxations:
 * no relaxations for the advance signing.

The principles for the signing of the lead-in taper are:
 * coning to Detail C2 or Detail B with 45° tapers is used — see Table A15 (Appendix 1); Table 5.3 in Section D5.4 specifies the taper length T;
 * a "keep left/right” sign (610) is placed on the near side at the start of the taper; and
 * a "lane closed" barrier (7105) with a "keep left/right” sign (610) is placed at the end of the taper behind the cones — the "keep left/right" sign should be mounted directly above the barrier sign or may be placed in front of the barrier or the last cone of the taper.

Relaxations:
 * if a conspicuous vehicle is parked at the works behind the taper then the barrier (7105) may be omitted; and
 * on congested roads, if it is impracticable to provide the full taper then the taper may be reduced to an angle of not more than 45° to the kerb using coning to Detail B.

The principles for the works zone are:
 * coning to Detail C1 is used to mark the edge of the works area safety zone. No additional signing is required.

The principles for the exit taper are:
 * coning to Detail B at 45° to the edge of carriageway; or
 * the same coning as that of the lead-in taper for central island works sites (Plan SC2).
 * a "lane closed" barrier (7105) with a "keep left/right" sign (610) is placed at the start of the taper behind the cones facing the opposing traffic — the "keep left/right” sign should be mounted directly above the barrier sign or may be placed in front of the barrier or the last cone of the taper

Relaxations:
 * if a conspicuous vehicle is parked at the works before the exit taper then the barrier (7105) and sign (610) may be omitted.

The principles for signing at the end of road works are:
 * a "road works" sign (7001 ) with supplementary plate "End" (645) located on the near side only, a distance E from the end of the works; see Table 5.3 in Section.

Relaxations: 116
 * end of road works signing may be omitted on roads with a permanent speed limit of 30mph or less when a relaxation applies.