Conditions of use
2.1. Signboards are in principle to be installed at a suitable height and in a position appropriate to the line of sight, taking account of any obstacles, either at the access point to an area in the case of a general hazard, or in the immediate vicinity of a specific hazard or object and in a well-lit and easily accessible and visible location.
Without prejudice to the provisions of Directive 89/654/EEC(1), phosphorescent colours, reflective materials or artificial lighting should be used where the level of natural light is poor.
(1)
O.J. No. L393, 30.12.89, p. 1