11.3 As an alternative to the cancellation bar, a separate temporary black on yellow sign may be provided indicating the change in route number. This can be mounted either on its own or beneath a permanent advance direction sign. An example is illustrated in figure 11-3. This sign must not be retained for more than two years (see para 14.2).
DIVERSION ROUTE SYMBOLS
11.4 Schedule 13 Part VII of the Regulations shows the symbols that may be added to permanent directional informatory signs to indicate a route to be followed when a motorway or high standard all-purpose road is closed during an emergency or during major maintenance or construction works. The design of these symbols is shown on working drawing S 56. Figures 11-4 and 11-5 show how the symbols are added to the destination blocks on the permanent signs. It should be noted that the symbol is always on a yellow patch whatever the background colour of the main sign. The symbol should always be associated with the route number of the road to be followed until the road or motorway to which the road user is returning is shown on the signs. The symbol should then be associated with this route number. The symbol may be shown on a destination panel, but never on a green or blue route number patch. The symbol should be placed to the right of or below the appropriate route number.
11.5 Where separate signs to diagrams 2703 and 2704 are used to indicate symbolic diversion routes, reference should be made to the working drawings for design details.
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