This report focuses on how sidewalks and trails can be made accessible and usable by the widest possible segment of the population. Sponsored by the Federal Highway Administration, a project to research existing conditions on sidewalks and trails for people with disabilities was designed in two parts. Part I, covers literature surveys, site surveys and interviews along with the history of accessibility legislation, travel characteristics of the disabled and engineering and construction design practices. Part II provides data on implementing the requirements of parts of two acts, Title II of the Americans with Disabilities Act of 1990 and section 504 of the Rehabilitation Act of 1973.