Indiana. State Highway Commission (1919-1953); Chicago Regional Planning Association2 maps on one sheet. Shows truck traffic flow in the Calumet and greater Chicago Regions as well as the 1930 population of the cities and towns in the Calumet Region. Includes inset location map. "Plate XVI." Detached from: Report of the Indiana State Highway Commission for the fiscal year ending September 30, 1931 / State Highway Commission. In Year book of the State of Indiana for 1931 / The Legislative Reference Bureau. Indianapolis : Wm. B. Burford, contractor for state printing and binding, 1932.Imprint: [Indianapolis] : [Wm. B. Burford, contractor for state printing and binding], [1932]; Imprint: [Indianapolis] : [The Legislative Bureau], [1932]Dimensions: on sheet 40 x 30 cmJPEGG4102.C33P22 1931 .C4engIndiana. Legislative BureauPublicTrucks--RoutesTraffic surveysMetropolitan areasRegion of Chicago--Indiana section : truck traffic in 24 hours on a typical week-day during August, 1931MapsNorthwest--IndianaIllinois--Chicago RegionIndiana--Calumet RegionIllinois1932Indiana University