Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/166

A1 APPENDIX – TABLES NOTES: Recommended sizes of all repeater warning or regulatory signs beyond the start of the entry taper in relation to the initial sign are as follows:

Chapter 3 provides further advice on size and spacing of speed limit signs, but the size and spacing of speed limit signs specified in this Chapter may be more onerous. The minimum number of warning signs in advance of a road works is dependent on the particular temporary trafﬁc management requirement. Generally for single carriageways there will be a minimum of two signs, but four or more signs may be required for more complex trafﬁc arrangements. Similarly for dual carriageways there will be generally a minimum of two signs in pairs, but seven or more may be required for complex traffic management arrangements. On roads with a permanent speed limit of 40 mph or less, for relaxation situations no advance signing is required in certain circumstances for off carriageway works (see paragraphs D3.20.2 and D3.20.3). On dual carriageway roads with a permanent speed limit of 40 mph or less, the "end of road works" sign (7001 with 645 plate) need only be placed on the near side of the carriageway. However, where traffic is diverted around an off side lane closure island it is recommended that one is also placed in the central reservation. All signs up to the start of the taper should be of the size shown. The siting distance of the first sign is given in metres or miles. However, to comply with the Regulations the distances on supplementary plates must be shown in imperial dimensions. Tables and plans show the placing of road works signs in equivalent metric dimensions; this utilises part of the permitted 10% tolerance on the placing of signs (paragraph D4.4.8), e.g. signs showing 400 yards being placed at 400 m. 164