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DUAL CARRIAGEWAY ROADS
Plan DZB9: Lane-change zone for a lane closure and lane width restriction ahead on a dual carriageway road for which the national speed limit applies
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Keys to the plans are given in Tables A1.4 and A15 of Appendix 1.
Where no hard shoulder is present, no signing to Detail A is required.
NOTE: For the spacing of speed limit repeater signs, see Table 3.4, Note 1.
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