Requiring prior approval - RTA

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Delineation – Section 5 Enhanced delineation devices (Requiring prior approval) (a) Type A Formed by mechanically screeding a conventional thermoplastic line and simultaneously applying transverse ribs of the same thermoplastic material at a regular interval. This type produces a good audible and tactile effect. Figure 5.8: Type A Profile linemarking (b) Type B Formed by extruding only, transverse ribs, placed directly onto the road surface. This line produces little audible effect and is intermediate in tactile effect. This type does provide drainage benefits. Any attempt to apply a coat of paint to form a continuous line, should be discouraged, if aquaplaning is a major concern. The spacing and configuration of ribs can be varied to suit any requirements, however, 250 mm is considered to be the optimum spacing. Figure 5.9: Type B Profile linemarking 5-10 Version 1.5 UNCONTROLLED WHEN PRINTED
6 0 m m 2 50 m m Delineation – Section 5 Enhanced delineation devices (Requiring prior approval) 5.2.6.4 Specifications The ribs shall be 60 mm ± 10 mm long (measured along the line) with a rib spacing of 250 mm ± 50 mm. The height of ribs shall be 10 mm ± 2 mm. 10 ± 2 mm Figure 5.10: Profile line on Motorways and Dual Carriageways 5.2.6.5 Guidelines (a) As Lane lines (Only type A) A broken profile lane line (L2) is used on motorways, dual carriageways; or special locations such as bridges and tunnels. Refer to Section 5.2.5 for description, guidelines and application of L2 lines. Profile lane line may also be used as enhanced lane line (L5). Refer to Section 5.2.4 for description, guidelines and application of L5 lines. Version 1.5 5-11 UNCONTROLLED WHEN PRINTED
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Requiring prior approval - RTA

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