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DUAL CARRIAGEWAY ROADS
Plan DZB3: Entry taper for a dual carriageway road for which the national speed limit applies Principles for entry tapers are:
- length of taper is 200 m/lane closed;
- coning to 1.5m spacing with marking to Detail E — see Table A1.5 (Appendix 1);
- one "keep left/right" sign (610) at the start of the taper;
- one "lane closed" barrier (7105) with a high intensity warning light and a "keep left/right" sign (610) at the end of each closed lane of the taper; and
- one "lane closed" barrier (7105) with a high intensity warning light every 50m along the length of the taper, the barrier midway along the length of each closed lane to have a "keep left/right" sign (610)
Principles for entry tapers for works for which relaxations apply are as for standard works except:
- length of taper is150 m/lane closed — however, where it is anticipated that site conditions may change to such an extent that it may become necessary to upgrade to standard works at some point during the works, it is recommended that the length of taper installed should be 200 m/ lane closed to facilitate that upgrade;
- coning to 3 m spacing, Detail B — see Table A1.5 (Appendix 1); and
- the "lane closed" barrier (7105) with a high intensity warning light every 50m along the length of the taper, the barrier midway along the length of each closed lane with the "keep left/right" sign (610) may be omitted.
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| Standard | Relaxation * see principles above | ||||||
| Keys to the plans are given in Tables A1.4 and A1.5 of Appendix 1. | |||||||
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