Gray on white with "controlled access sections on primary roads where project agreement requires B.P.R. approval before any driveway permits can be granted July 1, 1964" indicated in red. Circled in green are sections of state highways, other than interstate, that have been purchased as limited access., Imprint: [Indianapolis] : State Highway Commission, [1961], Dimensions: 94 x 59 cm
Indiana. State Highway Commission (1961-1981) (1961). 1961 state highway system of Indiana. Indiana. State Highway Commission (1961-1981). https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00879 (map)