DEVIATION OF ROUTE
23
either due to being thrown up into the path of oncoming vehicles
or by causing vehicles to
skid on the loose surface. While works are taking place, the sign to diagram 7009 (S13‑2‑10,
see
11.4.1
), the “Other danger ahead” sign to diagram 562 (when used in a temporary situation)
or the bend warning signs to diagrams 512, 512.1, 512.2, 512.3 or 513 (see
3.1
).
The sign
should be used sparingly, as in general it should be for drivers to judge what speed to adopt. It
is not easy to determine a standard
safe speed to negotiate a bend; factors which influence this
include
radius of curvature, camber/superelevation, road surface condition and type of vehicle.
The sign may be used where the road layout is such that a driver might be misled, e.g. at an
exit from a high-speed road where significant slowing is required
before negotiating a sharp
bend. It may also be used on high‑speed roads where the horizontal design radius cannot be
achieved, but a lower mandatory speed limit is not imposed on that bend. It must not be used
with
mandatory speed limit signs, nor in place of repeater signs.
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