Iowa Speed Study 1971 prepared by Iowa State Highway Commission, July 1971

(1971) Iowa Speed Study 1971 prepared by Iowa State Highway Commission, July 1971. Transportation, Department of

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Abstract

The Iowa State Highway Commission conducted speed studies during the month of July, 1971, at 23 locations. Normally 25 locations are surveyed, but because of road construction, two stations were omitted. Twenty of the stations are located on Primary highways and five are situated on the Interstate System. At four of the locations, data was also obtained during the nighttime. In the past, data had been collected semi-annually through 1967; and in 1968, studies were made at each station during the months of May, July and October.