Page:UK Traffic Signs Manual - Chapter 3 Regulatory Signs. 2008 (Second Impression 2008).pdf/22



If the ahead manoeuvre is prohibited at a crossroads (e.g. the road opposite is a one-way road controlled by "no entry" signs) and both left and right turns are permitted, the only upright signs that can be provided on the approach to the junction to indicate the prohibition are a map-type advance direction sign that incorporates the "no entry" roundel (or other regulatory roundel as appropriate) and an informatory sign to diagram 818.2. Directional arrows to diagram 1038 may be provided in the carriageway as appropriate. Where the only route through the junction is to the left or to the right, a sign to diagram 609 may be used at the junction, as shown in figure 4-7, together with the road marking to diagram 1036.1 or 1037.1 as appropriate. A plate to diagram 607 should be used with the sign only where traffic is turning into a one-way road. It is not appropriate to use a sign to diagram 606 pointing to the left or to the right at a crossroads (except where these are signal controlled, see paras 4.11 and 4.12). If the ahead manoeuvre is prohibited for only part of the day (e.g. a pedestrian zone) and either the left or right turn is prohibited, a sign to diagram 612 or 613 should be provided in place of the sign to diagram 609 (see figure 4-8). In this case the road markings to diagram 1036.1 or 1037.1 should not be provided.

At junctions controlled by traffic signals, the signs to diagram 606, 612 and 613 with a diameter of 300 mm may be mounted on the primary and secondary signals. They must be internally illuminated by day and by night. Unlike at uncontrolled junctions it is not appropriate to use a sign to diagram 609 at the junction itself as described in paras 4.8 and 4.10. However, if appropriate, a sign to diagram 609 may be erected on the approach to the junction.