This report describes the available high-tech methods for the remote monitoring of highway structures for the purpose of providing information to assist in the management of these structures. Monitoring the performance of a structure, or one its component parts, during construction and in service, can provide vital information on the ability of the structure to maintain full serviceability throughout its design life and in many instances for much longer periods of time. In many cases, monitoring has helped to alleviate doubts about structural safety and serviceability, and has assisted in making decisions to keep structures in full or part service. Information on structural performance can also be used to develop improved design standards for future structures. The report focuses on the use of monitoring as a tool for the management of structures which have failed a strength assessment according to the requirements of BD 21 (DMRB 3.4.3). The report builds on the information contained in BD 79 (DMRB 3.4.18) which provides guidelines on the management of sub-standard bridges and the role that monitoring can play in order to keep these bridges in service. The report also considers the use of monitoring as a management tool for new and innovative structures.

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