ROAD WORKS AHEAD
D4.12.5 Signs that provide advance information of road works ahead must be accurate and located sufficiently upstream of the works to give drivers the opportunity to choose whether they proceed through the road works or divert onto an alternative route.
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7002A
D4.12.6 Major road works at a specified location ahead. This sign should be sited on the near side verge upstream of the approach to road works signs. The sign should be located at least 1 mile upstream of the last exit junction prior to the works, preferably two junctions prior, to give drivers who have alternative route options the opportunity to avoid the road works. Information displayed 7002A on fixed signs should not be repeated on subsequent VMS signs. At times of severe delay, consideration should be given, in liaison with the National Traffic Control Centre, to the use of VMS outside the immediate area to divert traffic to other routes rather than use local diversions. Where delays are likely to be severe, consideration should be given to the erection of signs on adjoining connecting routes to advise of these delays.
D4.13APPROACH AND LANE CLOSURE SIGNING
FOR MAJOR ROAD WORKS ON HIGH-SPEED DUAL CARRIAGEWAY ROADS
D4.13.1 Informatory signs to diagrams 7004 and 7005, and their permitted variants, are used on trunk roads to describe the activity being carried out or how long delays may last. The most commonly used legends are listed in paragraphs D4.13.4, D4.13.6, D4.13.9 and D4.13.11.
D4.13.2 The range of legends should be kept to a minimum while conveying clear and meaningful information to drivers.
D4.13.3 Where VMS and central reservation matrix signs are available, their use for providing temporary support of road works signs during the setting up, alteration or removal of temporary traffic management arrangements should be considered.
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