| Rail Monitoring |  | Bridge Strike Monitoring |
Many bridge strikes go undetected and unreported with potentially serious consequences. Conversely, many reported bridge strikes are so minor that line closure and the subsequent train delays are unnecessary. Strainstall's Bridge StrikeAlert system provides the bridge owner with immediately accessible information on the severity of a bridge strike via a signal box display to the local signaller and infrastructure maintainers. This is achieved by instrumenting the bridge with lateral accelerometers, usually on the collision protection beams (where present) and main girders to obtain dynamic shock measurements. Depending on local procedures, this information can be used in the decision making process as to individual lines being kept fully open, trains cautioned or closed. CCTV can also be installed to provide images for the identification of the vehicle to detect if it is trapped under the bridge.
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