Integrated Systems

Tunnel radar

by Mark Rowe

After showing at Intertraffic 2014, Navtech Radar, a manufacturer of radar-based Automatic Incident Detection (AID) products for traffic management, reports on its venture into the tunnel world of Norway. Navtech supplied its ClearWay product for both the 4.5 km long Mastrafjord Tunnel, pictured, and the 5.8 km long tolled Byfjord Tunnel near Stavanger. Both are subsea road tunnel. The new ClearWay is part of a recently completed tunnel refurbishment project.

Radar AID was specified by Multiconsult, one of the largest ITS consulting firms in Norway. A paper on its choice of Radar AID was presented at the second ‘Tunnels and ITS’ Symposium in Bergen, in September 2013 by Kristian Jensen of Multiconsult.

Senior Engineer Lars Martin Rage, from Multiconsult says: “We started looking at Radar for AID in early 2012 and after recommendations from the Swedish road authority “Trafikverket” we carried out a site visit to the Hindhead Tunnel on the A3 in the South West of England which deploys 12 ClearWay radar across the twin tunnels. Subsequently radar was specified as the solution for both refurbishment projects of the Byfjord Tunnel and the Mastrafjord Tunnel. One of the key requirements was AID capability in very harsh weather conditions of snow, rain and fog around the tunnel entrances where sunlight can be a problem. We also needed a low-maintenance solution throughout the tunnel with a very low rate of false alarms.”

After a tender process Navtech were asked to supply multiple companies with quotations for their ClearWay AID with Trafsys eventually winning the tender with the Navtech offering of ClearWay.

All 24 radar plus Navtech’s analytical software, Witness, were integrated into the SCADA solution in the control room by Bergen-based systems integrator Trafsys. Working with Mesta, a Norwegian contractor, the AID was installed in three phases during the autumn of 2013.

Dr Stephen Clark, Technical Director of Navtech Radar says: “We’re incredibly pleased to note that our Radar based AID solution has now been adopted as a ‘de facto’ standard in many places. The Nordic Countries in particular have introduced the technology in a number of schemes. The Mastrafjord and Byfjord tunnels are exciting examples of recent projects that have successfully embraced our technology solution.”

Norway has more than 1,000 road tunnels – including the world’s longest road tunnel, the 25 km long Laerdal Tunnel. Visit www.navtechradar.com.

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