MANDATORY TURNS
13.6 Lane arrows supplemented with the legend TURN LEFT (see figure 13-3), TURN RIGHT and AHEAD ONLY are prescribed as diagrams 1036.1, 1036.2 and 1037.1 respectively. These versions may be used only where they indicate the effect of a statutory prohibition (direction 7). The markings are used to reinforce a green arrow traffic signal or a regulatory turn sign, e.g. entry into a one-way road where all traffic is required to turn in the same direction. The legend may be laid in a single line across two lanes or in two rows, as shown in figure 13-3.
GUIDANCE ARROWS
13.7 Lane markings may be laid in the junction where some guidance to traffic is considered to be helpful, although care should be taken that the meaning is clear to drivers on all approaches. Arrows to diagram 1038.1 (figure 13-4) may be used to indicate a route through a junction, or used in pairs to indicate that opposing right-turning traffic should pass near side to near side (see para 13.8). When used in pairs, a gap of at least one metre should be left between each arrow. Two lengths are prescribed for the arrow, 3025 mm or 4450 mm; normally the larger size will be appropriate, but at very restricted sites it may be necessary to use the smaller arrow. These arrows are identical to those that form part of the mini-roundabout marking to diagram 1003.4 (see figure 8-2) and shown on working drawing P1003.4 (see para 1.17).
13.8 Figure 13-5 shows the use of a pair of arrows to diagram 1038.1 at a signal controlled junction. Where a signal phase permits opposing right turns but no ahead movements from the right turn lanes, and there are no opposing dedicated lanes, use of the arrows to indicate that vehicles should pass near side to near side will help prevent conflict. If the number of right-turning vehicles is high, it would be of benefit to provide a dedicated right turn lane even if a separate signal stage is not provided.
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