Page:UK Traffic Signs Manual - Chapter 7 -The Design of Traffic Signs 2013.pdf/135

MISCELLANEOUS DESIGN DETAILS

Where a supplementary message at 80% of the main X-height is used on a stack type sign, the vertical position of the legend tiles relative to the arrow is determined as shown in figure 14-4. It should be noted that the design takes account of the rules described in para #3.37|3.37 and illustrated in figure 3-24. The design rules illustrated in figure 3-9 do not apply in this case.

Figure 5-33 illustrates the design of a map type sign that includes a destination reached by making a U-turn at a roundabout. This type of sign would generally be used on a dual carriageway where there are no gaps in the central reservation at side road junctions. An alternative to a map type sign is a stack type sign with a U-turn arrow, the design of which is shown in figure 14-5. It should be noted that the arrow is always placed to the right of the legend. The gap between the legend tiles and the arrow is increased from the standard value of 2.5sw to 4sw. This is because the tiles are adjacent to the arrow shaft and not the arrow head. The gap of 4sw also applies when a symbol, panel or patch is adjacent to the arrow. This sign should indicate the U-turn only. Other directions at the junction should be shown on a separate advance direction sign.

Any symbol that has a directional element to its design should face to the right when used with a U-turn arrow. The aircraft symbol, which generally points in the same direction as an arrow, should be horizontal and must not point downwards. Symbols should normally be placed on the left hand side of the sign, except for the aircraft symbol, which is generally placed to the right of the airport name. A symbol may also be centred beneath the associated destination where this results in a more efficient layout, taking account of the height of the U-turn arrow. An example is shown in figure 14-5.

Triangular warning signs and regulatory roundel signs may be included on U-turn signs and should follow the same design rules as for other stack type signs. However, the horizontal gap between the triangle or roundel and the arrow should be increased from 2.5sw to 4sw. A U-turn sign may 134