Bridge Modification: Proceedings of the Conference Bridge Modification Organized by the Institution of Civil Engineers, London, March 23-24, 1994

As the amount of traffic on our roads increases, so the bridges which carry that traffic are having to be modified to meet the changing demands on them. This modification may be in the form of widening, lengthening or replacement to cater for extra lanes of traffic. Alternatively, it may be some form of strengthening to enable an existing structure to continue to carry traffic with adequate margins of safety. In either case, the engineer is often faced with a complex set of technical problems in addition to the problem of dealing with live traffic.