TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 88: Service Life of Corrosion-Damaged Reinforced Concrete Bridge Superstructure Elements documents the data utilized in the development and validation of the service life model presented in NCHRP Report 558: Manual on Service Life of Corrosion-Damaged Reinforced Concrete Bridge Superstructure Elements. NCHRP Report 558 examines step-by-step procedures for assessing the condition of corrosion-damaged bridge elements. Also, the computational software (Excel spreadsheet) for the service life estimation process is available.