Page:UK Traffic Signs Manual - Chapter 7 -The Design of Traffic Signs 2013.pdf/79

DIRECTION SIGNS The design rules for positioning symbols on direction signs are generally the same as for other signs, as shown in figure 3-9 (see paras 7.6 to 7.10 for warning and regulatory signs on flag type signs). Generally the symbol should be placed at the opposite end to the chevron. The symbol may be centred below the legend if this results in a more compact sign. The "P" parking symbol is always placed to the left of its associated legend unless used in conjunction with a tourist attraction. The special rules given in para 4.8 then apply. Where the aircraft symbol is used, this should generally be placed to the right of the airport name, whether the sign points to the left or to the right. Where the airport name is the same as the place name destination along the same route, the aircraft symbol may be used on its own on a separate line ranged left. Symbols with a directional element (see Appendix B) should face either left or right as appropriate. The aircraft symbol should always be horizontal, pointing left or right as appropriate. Examples of the use of symbols are given in figure 7-2

The design rules for placing triangles and roundels adjacent to chevrons on flag type signs are shown in figure 7-3. The triangle or roundel is always placed on the same side of the legend as the chevron. Where the sign has a green or brown background a white edge is added to the outside of the triangle or roundel. The appropriate heights for the triangles or roundels (excluding any white edges) are given in Appendix D.

Distance plates to diagram 572 may be added below the triangles or roundels, as shown in figure 7-3. The plate is designed as a normal sign and then reduced to 80% of its size. Thus if the x-height of the main sign is 100mm, the x-height of the plate will be 80mm. Where the plate is placed on a green or brown background the border is omitted, the corner radii remaining at 1.5 sw based on the plate x-height (i.e. 1.2 sw based on the x-height of the main sign). The plate should not cross a line offset from the chevron by 2 sw. A plate indicating the distance from the junction to the restriction should always be used unless the restriction indicated commences at the junction.

Where a destination is indicated to the right, any distance is generally placed to the right of the warning or regulatory sign. However, where more than one destination is shown, the clarity of the sign is improved, as for stack type advance direction signs, by placing the distances between the place names and the warning triangle or regulatory roundel (see figures 4-12 and 4-15 for stack type sign examples).

Two triangles or roundels, or one of each, may be included on a flag type sign. The design details are similar to those for stack type advance direction signs (see figures 4-13, 4-16 and 4-17).

The dimensions relating to the various gaps apply equally to plates with and without borders and to triangles with and without white edges. The gap is measured to the outside of any border or edge provided. 78