Artikel 6

1. Signs shall be so placed that the drivers for whom they are intended can recognize them easily and in time. They shall normally be placed on the side of the road appropriate to the direction of traffic; they may, however, be placed or repeated above the carriage-way. Any sign placed on the side of the road appropriate to the direction of traffic shall be repeated above or on the other side of the carriageway if local conditions are such that it might not be seen in time by the drivers for whom it is intended.
2. All signs shall apply to the drivers for whom they are intended over the whole width of the carriageway open to traffic. However, signs may be made to apply to only one or to several lanes of the carriageway when lanes are defined by longitudinal markings.
In this case, one of the following three options shall be used:
a) The sign with, if necessary, the addition of a vertical arrow shall be placed above the lane concerned, or
b) The sign will be placed on the nearside edge of the carriageway when the road markings indicate without doubt that the sign applies solely to the traffic lane on the nearside of the carriageway and that the only purpose of this sign is to confirm a local regulation already indicated by means of road markings, or
c) Signs E, 1 or E, 2 described in Annex 1, section E, subsection II, paragraphs 1 and 2 to this Convention or signs G, 11 and G, 12 described in Annex 1, section G, subsection V, paragraphs 1 and 2 will be placed on the edge of the carrageway.
3. Where in the opinion of competent authorities a sign would be ineffective if placed on the verge of a road with separated carriage ways, it may be placed on the dividing strip and in this case need not be repeated on the verge.
4. It is recommended that domestic legislation should provide:
(a) That signs shall be so placed that they do not obstruct vehicular traffic on the carriageway, and, if placed on the verges, obstruct pedestrians as little as possible. The difference in level between the carriageway on the side where a sign is placed and the lower edge of the sign shall be as uniform as possible for signs of the same class on the same route;
(b) That the dimensions of sign panels shall be such that the sign is easily visible for a distance and can be easily understood by a person approaching it; subject to the provisions of sub-paragraph (c) of this paragraph, these dimensions shall be adapted to the normal speed of vehicles.
(c) That the dimensions of danger warning signs and of regulatory signs (except special regulation signs) shall be standardized in the territory of each Contracting Party. As a general rule, there shall be four sizes for each type of sign: small, normal, large and very large. Small signs shall be used where conditions do not permit the use of normal signs or where traffic can only move slowly; they may also be used to repeat a preceding sign. Large signs shall be used on very wide roads carrying high speed traffic. Very large signs shall be used on roads carrying very high-speed traffic, such as motorways.