This document is a comprehensive manual on programs, procedures, and techniques for properly preserving and maintaining highway bridges. This manual is primarily geared towards individuals involved in onsite bridge maintenance and preservation activities and those that supervise and manage these activities, however many subjects may be of value to engineers and preservation specialists. The BMRM is a revision and upgrading of the previous manual. Improved bridge maintenance techniques are addressed, and suggested procedures, decision-aid matrices and job order checklists are provided. The purpose of the BMRM is to provide instructions and references for performing a wide range of useful and effective bridge concepts that can be adapted and expanded to provide solutions to specific bridge problems. These procedures are not intended to override existing agency guidelines or policy, but are to be used as a source of information when the need arises. They are not intended as a substitute for consulting an engineer with appropriate qualifications to determine the proper repair method. This manual has been developed as a reference to a new National Highway Institute course series on Bridge Maintenance, consisting of an instructor-led course, "Bridge Maintenance" (FHWA-NHI-130108); and four web-based training courses, "Fundamentals of Bridge Maintenance" (FHWA-NHI-130107A), "Bridge Maintenance Painting" (FHWA-NHI-130107B), "Maintenance of Movable Bridges" (FHWA-NHI-130107C), and "Maintenance of Masonry Bridge Elements" (FHWA-NHI-130107D).