Smith, W. S. (1946). The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control. https://rosap.ntl.bts.gov/view/dot/16274
Smith, Wilbur Stevenson. The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control, 1946. https://rosap.ntl.bts.gov/view/dot/16274.
Smith, Wilbur Stevenson The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control, 1946, ROSA P. https://rosap.ntl.bts.gov/view/dot/16274.
No attempt has been made to evaluate the following data; they are presented in a purely objective manner. Information on official traffic organizations in the United States was sought from highway and police organizations of all states, as well as from engineering and police departments of cities with populations of 50,000 or more. To collect the data, questionnaires were distributed to the head of each state highway department, to the head of each state police organization, to the director of public works or engineering departments of cities, and to the chiefs of city police. The response of public officials was excellent. The high rate of questionnaire return is indicated by results shown in Table 1. Ninety-four per cent of the state highway departments and 81 per cent of the state police organizations completed and returned the questionnaires.
Smith, W. S. (1946). The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control. https://rosap.ntl.bts.gov/view/dot/16274
Smith, Wilbur Stevenson. The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control, 1946. https://rosap.ntl.bts.gov/view/dot/16274.
Smith, Wilbur Stevenson The Organization of Official Traffic Agencies in Cities and States: A National Survey. Eno Foundation for Highway Traffic Control, 1946, ROSA P. https://rosap.ntl.bts.gov/view/dot/16274.
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