Art. 103 Ordinance of September 5, 1979 on Road Signage (OSR) - Placement of Signs
Art. 103 OSR · Placement of Signs
The signs shall be placed on the right-hand side of the road. They may be repeated on the left side, suspended above the roadway, installed on islands, or, in cases of absolute necessity, placed only on the left. Signs indicating the end of a regulation on secondary roads may be placed only on the left, on the reverse of the opposite sign.
The signs shall be placed in such a manner that they can be seen in time and are not obscured by obstacles. Non-illuminated signs (Art. 102, para. 4) must be placed so that they are visible in the vehicle lights.
The lower edge of the signs shall be between 60 cm and 2 m 50 from the top of the road; this distance shall be at least 1 m 50 on highways and semi-highways, and at least 4 m 50 when the signs are suspended above the roadway. For temporary signage or in cases of urgent necessity, the lower edge of the signs may be lower.
The signs must not protrude into the clear road space profile. The distance between the edge of the road and the nearest side of the sign shall be 30 cm to 2 m within localities and 50 cm to 2 m outside localities, in special cases up to a maximum of 3 m 50; on highways and semi-highways, it shall not be less than the lateral clearance specified by the construction plans.
To warn of particular dangers, the "Other Dangers" sign (1.30) may also be placed on variable message boards of maintenance vehicles or escort vehicles of special vehicles and special transports in motion or stationary on the roadway.