"Bridge decks are expected to proved relatively maintenance-free service for approximately 40 years. It has been found, however, that some unprotected bridge decks require major repairs within 5 to 10 years, and often must be replaced after 15 years of service. This premature deterioration is frequently the direct result of an accelerated corrosion process on the reinforcing steel caused by the intrusion of deicing chemicals into bridge deck surfaces. A number of bridges on the Federal-aid system do not have a protective system on their decks. If these bridge decks were protected now, significant savings could be realized by avoiding more expensive repairs later. One positive method of stopping the corrosion process in reinforced concrete bridge decks is cathodic protection. Cathodic protection (CP) has been used for many ears to control the corrosion of buried pipelines and structures in saltwater environments. During the past 8 years, the Federal Highway Administration (FHWA), through its Demonstration Projects Division, has promoted the use of this technology as a means of preserving existing unprotected reinforced concrete bridge decks. Assistance has been provided to requesting highway agencies for the construction and evaluation of 22 cathodic installations in conjunction with Demonstration Project No. 34, Cathodic Protection for Reinforced Concrete Bridge Decks. This report provides a summary of the information furnished by participating highway agencies; it includes project selection criteria, design considerations, construction procedures and problems, and performance criteria and results"--P. i.