Effect of control devices on traffic operations - Leisch, Jack E.; Pfefer, Ronald C.; Moran, Patrick J.; De Leuw, Cather & Company; United States. Bureau of Public Roads; American Association of State Highway Officials; National Research Council (U.S.). Highway Research Board ([Washington] Highway Research Board, National Research Council, 1967)
"NCHRP project 3-6 FY '66."
Research sponsored by the American Association of State Highway Officials in cooperation with the Bureau of Public Roads.
Study conducted by De Leuw, Cather & Company.
Bibliography: p. 82-83.
Keywords: Traffic signs and signals; Roads -- Interchanges and intersections