DUAL CARRIAGEWAY ROADS
Plan DZC5: Lead-in zone for a two-lane changeover with narrow lanes using the hard shoulder
Guidance on the design of the changeover is given in Section D66.
The principles for the changeover are as follows:
- a "move to the hard shoulder" sign (7230 with symbols 7281 and 7283)with top panel "NARROW LANES" (7264) and bottom panel "200yds" (7271) on the near side and off side placed 200m in advance of the changeover — this sign may be located in the lane-change zone if the lane move is the first manoeuvre of the road works as in the secondary direction of a partial contra-flow system;
- a "move to the hard shoulder" sign (7230 with symbols 7281 and 7283) with top panel "USE HARD SHOULDER" (7260) on the near side placed at the start of the changeover;
- coning to Detail F is used on the near side;
- coning to Detail E is used on the off side;
- one "keep left/right" sign (610) at the start of the changeover; if this is placed in a closed lane, as opposed to a normally non-trafficked area such as the central reservation, then a "lane closed" barrier (7105) with a high intensity warning light should be added;
- one "lane closed" barrier (7105) with a high intensity warning light and a "keep left/right" sign (610) at the end of the changeover;
- one "lane closed" barrier (7105) with a high intensity warning light and a "keep left/right" sign (610) at the end of each lane crossed;
- white lining or temporary studs to Detail J is used as road marking between lanes;
- signing to Detail A is used on the hard shoulder at the start of the changeover; and
- where a temporary mandatory speed limit is in place, signs to diagram 670 should be continued from the lane-change zone; for the spacing of speed limit repeater signs, see Table 3.4, Note 1.
No relaxations apply.
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