Page:UK Traffic Signs Manual - Chapter 7 -The Design of Traffic Signs 2013.pdf/136

 include an alternative route message and should be designed in accordance with figure 14-4.

As a U-turn sign generally indicates the same road that it is located on, panels indicating a different status of route are not normally used (but see para 14.15). However, the sign may include a bracketed route number patch as shown in figure 14-5

There may be certain junction layouts where a U-turn at a roundabout does not lead back to the same route (e.g. an urban one-way system, or a grade separated junction). A map type sign may be more appropriate in this situation, but a separate U-turn sign could be provided if necessary. If the status of the route changes, a panel should be used.

The sizes of symbols when used on directional informatory signs are specified in Appendix B. On certain signs, more than one symbol may be placed on one line. Alternatively, two symbols, one above the other, may be associated with the same legend. In both these circumstances, the standard sizes for the symbols may produce an out of balance pictorial representation. A good example is the car and lorry symbols, where the car symbol is actually the larger of the two. A similar problem occurs with the lorry and bus symbols, and reference to figure 12-7 (commercial vehicles waiting prohibition plates) shows that it is necessary to modify the sizes. In the case of figure 12-7, the lorry has been increased in size from 24 x 12sw to 30 x 15sw, and the bus reduced in size from 40 x 13sw to 34 x11.05sw. The general rule is that where two symbols appear out of balance, one should be increased in size and the other reduced. An example is shown in figure 14-6. To leave one symbol the same size could result in the other symbol (which has either been increased or reduced in size) being out of balance with other elements of the sign and inappropriate for the size of x-height being used. 135