points. Consideration also should be given to the provision of additional side road signing and the temporary removal or masking of any inappropriate road signs (before or along the carriageway or on side roads). This may include dual carriageway signs to diagrams 608, 818, 818.1, 818.1A, "no entry" signs to diagram 616 or "restrictive turning" signs to diagrams 606, 612, 613 where these movements are to be permitted during the works period.
D3.42.11 Plans TS1 to T54 show the principles of the traffic management on roads for which the national speed limit applies, for works in the vicinity of the transition between a dual carriageway and a single carriageway and vice versa.
Plan TS1: Transition section (dual to single), works starting between the end of the dual carriageway and 600m downstream on the single carriageway road
The principles for the approach signing are:
- a "road works" sign (7001) with supplementary plate "1 mile" (572) placed on the near side 1600m in advance of the works lead taper,
- a "road works" sign (7001) with supplementary plate "800yds" (572) placed on the near side 800m in advance of the works lead taper,
- a "road works" sign (7001) with supplementary plate "400yds" (572) placed on the near side 400m in advance of the works lead taper, and
- a "road narrows” sign (517) with supplementary plate "200yds" (572) placed on the near side 200m in advance of the works lead taper.
NOTE: Where sight lines on the single carriageway road are particularly poor, such as on a left-hand bend, a duplicate set of signs should be placed on the other side of the single carriageway.
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