Canton, Ohio made successful traffic survey by sending out 23,780 questionnaires to passenger car owners; 52.5% of them were filled out and returned; results of actual traffic count crossing screen line agreed within 5% with those of survey.
Canton counts its traffic by postcard
Eng News-Rec
Engineering News-Record ; 142 , n 1
1949
2 pages
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Hand distributed postcard parking survey
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