1.15.1 and section
7 .
1.7 Vehicle-activated signs 1.7.1. S2‑7‑3 permits certain warning signs (diagrams 504.1, 505.1, 506.1, 507.1, 510, 512,
512.1, 512.2, 512.3 and 513) when displayed by means of light‑emitting characters or symbols
also to display below the sign, and at the same time, the legend “SLOW DOWN” in characters
not less than one quarter of the height of the triangle. The signs will be triggered by vehicles
exceeding a pre‑determined safe speed on the approach to a junction or bend. They should
be used only to supplement fixed signing, and not as a substitute for it. Vehicle- activated
signs should not be considered until the fixed signing and road markings have been checked
INTRODUCTION
9
to ensure that they comply fully with the guidance in this chapter and in Chapter 5 in terms of
correct size, siting, visibility and condition.
