Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/209

DUAL CARRIAGEWAY ROADS

To mark the running lanes through the works area, the principles are:
 * if the running lane is adjacent to the works, then coning to Detail F is used — if existing carriageway markings are suitably located and in good condition then Detail C1 may be used,
 * a sign indicating the number of lanes open to traffic (7205) with distance plate (7209) "For x miles" is required located on the off side at V2 mile intervals; and
 * where a temporary mandatory speed limit is in place, signs to diagram 670 should be continued from the lead-in zone; for the spacing of speed limit repeater signs, see Table 3.4, Note 1.

If a section of the works zone is used purely for access then consideration should be given to placing a "keep left/right" sign (610) on the approach to any works area located after the access. The designer shall assess if additional 610 signs are needed where specific risks in the works zone or changes in road geometry would justify additional guidance to road users.

In the case of a non contra-flow situation a relaxation may apply. The principles are as for standard works except:


 * coning to Detail F or C1 may be replaced by coning to Detail C1 or D — the cone spacing depends on the permanent speed limit — see Table A1.3 (Appendix 1); and
 * the signs indicating the number of lanes open to traffic (7205) with distance plate (7209) "For x miles" are not required.


 * Not required where there is a relaxation.

Keys to the plans are given in Tables A1.4 and A1.5 of Appendix 1. 208