Sign gantry

The sign bridge (also called signpost bridge or traffic sign bridge, VZB for short ) is part of the road equipment and serves as a carrier system for signposting or variable message signs . It is mainly used on motorways or multi-lane inner - city roads and enables safe traffic control there.

A sign gantry consists of a transom / stem construction (steel or aluminum box girder , more rarely also made of concrete ), which is attached to foundations on the side of the roadway and, if necessary, equipped with an impact base .

In addition to the bridge variant, a one-sided installation (called a jib or cantilever arm ) is also possible. In any case, due to the large area exposed to wind, a static calculation must prove the stability of the construction.

Illustrations (examples)

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  Sign gantry with trailblazing signs

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  Sign gantry with changing signposts

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  Cantilever arm with inner-city signs ( Marl )

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  Digital variable message signs

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  Sign gantry at Baden AG , Switzerland

Norms and standards

Germany

• Additional technical contract conditions and guidelines for civil engineering structures (ZTV-ING)

Austria

• RVS 13.03.51 signpost bridges
• RVS 04/13/31 signpost bridges

Web links

Commons : Sign gantry  - collection of images, videos and audio files

• Article in Focus magazine on the subject of gantries

• 80 of the 120 sign gantries in Cologne are more than 30 years old; many are corroded (2012)