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Road tunnel in Sweden made safer with video camera network

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Almost 500 cameras are being installed in a road tunnel on the Norra Länken (Northern Link), a motorway in Stockholm, Sweden, between Norrtull and Karlberg. The cameras will monitor the entire tunnel and the surface road network for traffic flow and incidents, such as breakdowns or accidents.

To implement the network, the Swedish authorities turned to ISG, a systems integrator and intelligent video analysis specialist, based in the southern, coastal city of Höganäs.

At the heart of the ISG system is a Sony FCB vision camera. Upon detection of a traffic incident, the system automatically sends image sequences directly to Trafikverket and Stockholm stad's (the City of Stockholm’s) traffic management centre, Trafik Stockholm, enabling the operations management team to determine further actions.

ISG is also in the process of upgrading functionality by adding other technologies, for example radar detectors. ISG’s solution can combine information from different detection systems regardless of the technology and brand. The company will also supply vandal-resistant emergency telephones which are installed for example in first aid rooms, SOS cabins, at all on-ramps and off-ramps and at the parking slots at the various maintenance areas. When distressed road users pick up the phone, the call will be automatically directed to the operators at Trafik Stockholm.

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