Inset map for Kansas City and the surrounding area from the 1937 official state highway map. A comparison with the same inset for 1938 finds the following routes changing between the two years: US 40, US 69, and US 71. This appeared to be the last year for "city routes" in Kansas City (but not in St. Louis); in 1938, they were replaced either with the actual route. The former location of the main routes were usually replaced with routes designated as "alternate".