Radio serviceSwitzerland
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77. Radio service
A radio service is a radio broadcast that provides drivers with traffic information such as congestion, road closures, accidents, weather conditions or other events affecting a journey. Roadside signs may indicate a particular radio station and frequency where traffic information is available.
Drivers can tune to the indicated frequency to receive local traffic information while travelling through the area. The service is informational and does not replace traffic signs, signals or instructions from authorised persons.
Wikimedia.org • Marc Mongenet • CC BY-SA
What is a traffic radio service?
A traffic radio service broadcasts information for road users, such as congestion, collisions, roadworks, closures or other conditions that may affect traffic.
What does a radio service road sign indicate?
It indicates a radio station or frequency on which drivers can receive traffic information relevant to the road or surrounding area.
Do radio traffic reports override road signs?
No. Radio information can help drivers anticipate conditions and choose a route, but drivers must continue to obey traffic signs, signals, road rules and instructions from authorised persons.

Traffic rules
Switzerland