The Samuel Beckett Bridge in Dublin (Ireland) is a cable-stayed bridge, with a total length of 120 meters, and joins the north and the south side of the city over the River Liffey in the Docklands area. It has been officially opened to traffic on the 11th December 2009 and its purpose is to facilitate traffic flow traversing the capital from north to south. And where does video detection technology fit in here?
The bridge has been designed on a massive pivot, which allows it to open through an angle of 90 degrees, allowing ships to pass through. To ensure that there are no vehicles anymore on the bridge before opening it to ships, Dublin City Council has installed three TrafiCam x-stream detectors.
TrafiCam x-stream provides detection and monitoring of moving and stationary vehicles. On the Samuel Beckett Bridge, the sensors are configured to detect the presence of vehicles on the bridge. On the north and south side of the bridge, one TrafiCam x-stream sensor with narrow angle (6 mm) has been installed, looking to the middle of the bridge for 60 meters. On the north side, there’s also one extra TrafiCam x-stream with wide angle (2,1 mm). This sensor is installed on the bridge itself after the stop bar, while the two wide angle sensors are installed next to the bridge.
Via detection zones (virtual loops) and detection outputs, the vehicle presence information is transmitted to the controller. When there’s no vehicle on the bridge detected by these intelligent sensors, the controller can instruct safely to open the bridge.