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- Cameras
- Traffic
- Tunnel
- Cars
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Vienna (pte022/14.03.2013/18:37) - Microphones could prove more effective than cameras in monitoring traffic accidents in tunnels according to a new survey by an Austrian research institute.
CCTV cameras are common in many road tunnels and in most cases operate without microphones, but the new research by the Joanneum Research group based in Graz in southern Austria shows microphones are more effective.
The microphones, which are located every 100 metres and coupled to video-cameras, are able to identify sounds such as tire bursts, container goods tumbling across the road and car crashes.
The microphones have been tested in the 2,700-metre long Kirchdorf Tunnel (Styria, south of Austria) for the last two and a half years. The positive effects of the new technology were presented during the "Future Conference".
Results of this test show that all critical incidents were detected by the acoustic system before any other medium. In comparison to other security systems, researchers were able to cut up to two and half minutes off the time it takes to get to the scene of the accident.
Director of the project Franz Graf said: "Through detection algorithms, it is possible to identify dangerous noises and alert the tunnel security teams using camera links - all within 0,25 seconds."
The acoustic tunnel surveillance system is now due to be installed in the Bosrucktunnel between Upper-Austria and Styria and the bypass north of Klagenfurt (Carinthia).
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