This study consists of (a) investigation of current practices in several states to upgrade truss bridges; (b) literature search for state-of-the-art perspective; (c) evaluation of information from the FHWA bridge inventory; and (d) search for examples of truss bridge rehabilitation. The information is used to develop and evaluate various methods to rehabilitate through truss bridges. Methods or rehabilitation are formulated, analyzed and designed to suit the most general condition of truss bridges. Several problems exist with through truss bridges; these are presented in the report. The methods are applied to the one existing, typical bridge to demonstrate proposed methods, and to identify problems, limitations, and construction procedure as applied to actual bridges. Both specifications and drawings are included, and cost comparisons between rehabilitation and replacement are made. Recommendations for future research are given.
Dynamic compaction has been found to produce densification in certain natural and fill deposits to depths varying from 10 to 35 ft below grade and has...
This state-of-the-art report documents the constituents of highway runoff and their pollutional effects. It provides a general background about the pr...
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United States Department of Transportation
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