In Japan, a real-time incident detection and warning system installed on a dangerous curve on the Hanshin Expressway decreased the rate of secondary crashes by 50 percent.
TV cameras were installed at Awaza curve on the Hanshin Expressway to automatically detect disabled vehicles and those involved in accidents by processing their image.
The system reduced the time required to provide information to trailing vehicles from 8 minutes to 2 seconds. Consequently, the rate of secondary accidents decreased to half of what it was before the system was introduced. A system was introduced that automatically detects unforeseen occurrences in tunnels by way of image processing. When the image processing device detects these occurrences, it displays warnings on an indicating device and makes available on-the-scene pictures recorded by the cameras.
Intelligent Transport Systems Handbook in Japan
Published By: Highway Industry Development Organization, Ministry of Construction
Source Date: October 1997
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DMS, CMS, VMS, Changeable Message Signs, Variable Message Signs, CCTV, closed circuit television cameras, road monitoring, camera imaging