<p>Restoration work of any structure is seldom simple and a straight forward activity. As one proceeds with the work, at times, it brings up surprises and unexpected problems. The rehabilitation engineer has to be resourceful and innovative in dealing with such challenging situations. In absence of sufficient data and drawings, he has to make prudent assumptions to resolve complex issues. How this is tackled in India on some projects is brought out here.</p>

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Bridges are the vital infrastructure elements of Indian Railways and Highways network. There are more than 200,000 bridges on this system. Maintaining them in safe and serviceable condition gets high priority. At times, they get adversely affected and are required to be rehabilitated by adopting novel techniques. In the process, study of causes of deterioration has revealed that there is potential improvement possible to enhance durability aspects.Similarly, improvements are required to be done in bridge structures due to situational, environmental and loading changes. How these improvements are done is described in this article.

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