This collection includes correspondence (1948-1966); bulletins with ticket samples (1905; 1911-1937); car data (1914; 1924); list of Multnomah County deeds; "Designated Coach Stops" booklet (circa 1954); newsletters (1949-1965); notices (1907-1908; 1912; 1930); street car passes (1936-1937); routes, tariffs and schedules (1907-1929; 1940-1953; 1965); time tables (1945-1948); wage agreements (1944-1964); and other related materials. Also includes 56 maps, drawings, and blueprints (1936-1946): map of routes for electric coach, motor coach, and street car (1946); plans of proposed curb changes; and blueprints of trolley bus overhead. The collection was donated in memory of Philip A. Adams. Microfilm includes clippings (1936-1948) from Portland newspapers regarding Portland Traction Company's vehicles, franchises, routes, labor situation, and other topics.