Norphonic Emergency Roadside Telephones (ERT) has been installed in the 5053 meter long Flenja Tunnel, located on the west coast of Norway. The Flenja Tunnel was opened in 1985 and is an important link in the ferry-free road connection between the two largest cities in Norway (Bergen and Oslo). It is especially significant for winter traffic when the high mountain passes are closed, or subject to closing, due to snow. At the start of 200

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