the retained place names should be provided for the entire destination block. Where additional place names are added, it may be necessary to use abbreviations (see para 2.11). Examples of the correct and incorrect use of cover plates are shown in figure 11-6, which also illustrates, for comparison purposes, the alternative solution of providing a complete new sign.
11.10 Where a satisfactory sign cannot be produced by modifying the existing sign, and where the provision of a new replacement sign is ruled out on the grounds of cost, consideration should be given to the provision of a separately mounted supplementary sign showing the new information. Minor modifications may still need to be made to the existing sign. A new sign, replacing both the existing and supplementary signs, can be provided at a future date when funds permit or as part of a maintenance programme. Where there is likely to be a series of changes to a particular sign brought about by the progressive opening of a new road, consideration should be given to the provision of supplementary signs and minor modifications to the existing sign, with a view to providing a new sign once all the changes have taken place.
GENERAL DESIGN CONSIDERATIONS
11.11 By following the design rules for directional informatory signs covered in sections 3 to 11, it is possible to produce different layouts for the same sign. Figures [[#fig11.7|11-7 to 11-13 show some examples, described below in more detail.
11.12 Figure 11-7 is a stack type sign showing a simple crossroads where the side roads enter at an angle. Only one destination and route number is shown for each direction. Sign 1A is the smallest of the group, but is a little cluttered as there are two lines for each directional panel. The panels are stacked in the conventional order, that is left turn above right turn. Sign 1B differs only in that the right turn is shown above the left turn. This sign is easier to understand, as the pattern of the arrows emphasizes the junction layout. Sign 1C improves the clarity of the sign further by placing the route numbers alongside the place names. The arrows now determine the height of each directional panel, creating additional space between the legends and the panel dividers/sign borders. This extra space makes the sign easier to read. This sign, being wider than sign 1B, may be more suited to footway
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