ANALYSIS OF SHORT COUNT METHODS IN MEASURING TRAFFIC FLOW

THE PURPOSE IS TO REPORT ON AN ANALYSIS OF SHORT-COUNTS VARYING IN DURATION FROM 5 TO 60 MIN. EACH AND SELECTED UNDER CAREFULLY CONTROLLED SCHEDULES. DATA FROM THREE MECHANICAL COUNTERS GEARED TO PRODUCE COUNTS IN 5-MIN. INTERVALS AND OPERATED FOR A FULL YEAR PERIOD PROVIDED THE BASIC MATERIAL FOR THE ANALYSIS. ROADS OF DISSIMILAR TRAVEL AND VOLUME CHARACTERISTICS WERE SELECTED. RESULTS OF APPLYING 1440 SCHEDULE COMBINATIONS OF SHORT COUNTS IN VARIOUS 7-HOUR PERIODS FROM 10 A.M. TO 8 P.M. ARE SUMMARIZED. THESE FIGURES DEMONSTRATE THE EFFECT OF CHANGES IN NUMBER AND DURATION OF SHORTCOUNTS ON THE ACCURACY OF ESTIMATING AVERAGE DAILY 24-HR. TRAFFIC. THE MAGNITUDE OF THE TRAFFIC STREAM TO BE MEASURED ALSO HAS AN IMPORTANT BEARING ON THE SELECTION OF A SCHEDULE AS CAN BE SEEN BY REFERENCE TO THE FIGURES FOR INDIVIDUAL STATIONS. IN ACTUAL PRACTICE, HOWEVER, WHERE A SHORT-COUNT SCHEDULE IS INSUFFICIENT WITHIN ITSELF TO REPRODUCE THE UNIVERSE, ADJUSTMENT FACTORS MUST BE BORROWED FROM A RELATED STATION. THE EFFECT OF THIS ADJUSTMENT ON THE RESULTANT ACCURACY OF THE WORK IS SHOWN USING SHORT COUNTS TAKEN DURING THE MOST FAVORABLE 7-HOUR COUNTING PERIOD (FROM 1 P.M. TO 8 P.M.) AND UNDER A 28-COUNT PLAN. /AUTHOR/

  • Supplemental Notes:
    • Vol 25, pp 329-342, 5 FIG, 13 TAB
  • Authors:
    • Cunningham, H E
  • Publication Date: 1946

Media Info

  • Monograph Title: Proceedings of the Twenty-Fifth Annual Meeting Held at Skirvin Hotel, Oklahoma City, Oklahoma, January 25-28, 1946
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00228065
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 22 1971 12:00AM