DUAL CARRIAGEWAY ROADS
Plan DZE2: End-of-works zone for a single-lane return changeover from the hard shoulder
Guidance on the design of the changeover is given in Section D6.6. The principles for moving a lane from the hard shoulder are as follows:
- the minimum signing requirement is the "rejoin main carriageway" sign (7231) with the top panel "REJOIN MAIN CARRIAGEWAY" (7261) at the start of the changeover in advance of the coning; if two lanes are returning then two signs to diagram 7231 are used, one on the near side and one on the off side;
- one "keep left/right” sign (610) at the start 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 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;
- coning to Detail E is used on the near side;
- coning to Detail F is used on the off side;
- coning to Detail C1 is used on the hard shoulder at the end of the changeover; and
- a temporary mandatory speed limit will be in place; signs to diagram 670 should be continued from the works zone; for the spacing of speed limit repeater signs, see Table 3.4, Note 1.
Where works traffic may be merging at the end of the works, additional coning to Detail C1 should be used to prevent traffic moving into the lane. For the additional signing required, see Plan DWA3 in Section D6.22. If the lane will not be used by works traffic then an exit taper with coning to Detail B at 45° to the carriageway is required.
Where the road's permanent speed limit does not change within the works site a sign combining the signs to diagram 7001, 645 and 671 or 670 on a yellow background should be used on both sides of the carriageway to mark the end of the road works and all associated restrictions, in place of the signs to diagram 7001 and 645. Where the permanent speed limit does change terminal speed limit signs are required (see paragraph D6.19.3).
The principles for works for which relaxations apply are as for standard works except:
- coning to Detail B is used on the near side;
- coning to Detail C1 is used on the off side; and
- following a risk assessment the hard shoulder/lane one raised rib marking may be retained at the changeover.
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