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PROHIBITION OF TRAFFIC
5.4 An alternative to incorporating a prohibitory sign in a directional sign is to use a sign to diagram 818.3 or 818.4. In many cases this can reduce the overall size of an advance direction sign as shown in figure 5-1 and should be considered where sign overload is likely to occur.
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| 818.3 Mandatory height limit at low bridge ahead. |
818.4 Mandatory height limit ahead and indication of alternative route |
| The legend, with the appropriate roundel, may indicate a weight, width or length limit. An arrow may be added (with "ahead" omitted). The location and alternative route shown on diagram 878.4 may be varied as appropriate and may include a reference to a motorway junction. A diversion route symbol may be added. The sign to diagram 878.3 may include an alternative route. The distance may be varied (see Appendix B). Details of the permitted variants are shown in Schedule 76 and in the table below each diagram in the Regulations. | |
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Single sign: This can be very large and might be difficult to site where there is limited verge width
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Two signs: These can provide a more compact arrangement. The sign to diagram 87 8.3 or 87 8.4 should be sited upstream of the advance direction sign for the junction
Figure 5-1 Alternative methods of indicating a restriction on a road at a junction ahead
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