Page:UK Traffic Signs Manual - Chapter 5 Road Markings. 2003 (Sixth Impression 2009).pdf/68



Grade separated junctions may involve merging and diverging lanes, or the gain or loss of lanes, or a combination of these. As junctions become more complex, so road marking layouts become more complicated. It is not practicable to detail all possibilities, but the standard principles should be followed. Reference should be made to TD 22 / 92 in Volume 6 of the Design Manual for Roads and Bridges (see para 1.4) for further guidance. When designing a complex layout, it should be borne in mind that it must be capable of being signed and marked in a way that drivers can readily understand.

The layout of markings and road studs at the simplest grade separated junction is shown in figure 10-1. The principal dimensions are detailed in tables 10-1 and 10-2. This arrangement is suitable forone or two-lane exit and one-lane entry slip roads.

The nosing of the slip road is marked using diagram 1042 (varied where appropriate to reverse the direction of the chevrons, see para 4.62). Red studs are provided at 3 m centres along the outside of both edges.

NOTE: Numbers (1) to (4) at the head of the above columns relate to features shown on figures 10-1 to 10-6.