D6.14.4 The plans generally show signing in the primary direction. In some plans, e.g. tidal flow, signing and coning demonstrating lane closures and lane changes in the opposing direction are included for clarity. The principles which guide the design of temporary traffic management arrangements for the primary direction also guide the design for the secondary direction and designers will need to apply them appropriately in order to produce the full temporary traffic management design.
D6.15APPROACH ZONE
D6.15.1 The approach zone starts at the first sign and continues to 100 m upstream of the first sign requiring a lane-change decision.
D6.15.2 List of plans:
Plan DZA1 Approach zone for a dual carriageway road with a permanent speed limit of 40 mph or less
Plan DZA2 Approach zone for a dual carriageway road with a permanent speed limit of 50 mph or 60 mph
Plan DZA3 Approach zone for a dual carriageway road for which the national speed limit applies, where queuing is expected
PRINCIPLES OF DESIGN FOR THE APPROACH ZONE
Plan DZA1: Approach zone for a dual carriageway road with a permanent speed limit of 40 mph or less
The principles for advance signing are:
- "road works” signs (7001) with distance plate (572) on the near side and the off side, placed 300 m in advance of the works;
- where the speed limit is 30 mph the distance plates may be omitted.
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Keys to the plans are given in Tables A1.4 and A1.5 of Appendix 1.
NOTE: The distance on the supplementary plate refers to the location of the initial cone of the works lead taper.
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