APPLICATION OF MECHANICAL ANALYSIS TO TRAFFIC RECORDER DATA

THE OREGON STATE HIGHWAY DEPARTMENT IN 1958 APPLIED DATA PROCESSING EQUIPMENT TO THE ANALYSIS OF TRAFFIC COUNT DATA OBTAINED FROM MECHANICAL RECORDERS. THE USE OF MECHANICAL DATA PROCESSING EQUIPMENT HAS CERTAIN ADVANTAGES IN TERMS OF (1) VERSATILITY OF THE MANIPULATION OF THE MANY FACETS OF DESIRED DATA, (2) ABILITY TO ACCOMMODATE EXPANDING COUNTER COVERAGE WITH MINIMAL COST INCREASES, AND (3) ECONOMY DERIVED FROM EFFICIENCY OF OPERATION AND AVOIDANCE OF TRAINING ADDITIONAL PERSONNEL WHEN COUNTER COVERAGE IS EXPANDED. THE RESULTS OF USING THE DATA PROCESSING EQUIPMENT WERE MOST GRATIFYING IN THAT THE ACCURACY OF THE RESULTING DATA WAS ENHANCED, COUPLED WITH THE EASE OF ITS DEVELOPMENT AND TIME SAVED IN ANALYSIS. STATISTICAL ANALYSIS OF THE 13 STATIONS USED IN THE PILOT STUDY INDICATE THAT (1) ADT ESTIMATES BASED ON WEEKDAYS BEGINNING AT NOON WERE SIGNIFICANTLY MORE ACCURATE THAN THOSE BASED ON WEEK DAYS BEGINNING AT MIDNIGHT, (2) ADT ESTIMATES OBTAINED FROM 48-HR SHORT COUNTS WERE TYPICALLY NOT SIGNIFICANTLY MORE ACCURATE THAN THOSE OBTAINED FROM 24-HR SHORT COUNTS, (3) ADT ESTIMATES FROM COVERAGE COUNTS BEGINNING EARLY IN THE WEEK AND FROM COVERAGE COUNTS ENDING LATE IN THE WEEK WERE LESS ACCURATE THAN THOSE TAKEN FROM THE MORE CENTRAL PORTIONS OF THE WEEK, (4) ADT ESTIMATES ADJUSTED BY WEEKLY SEASONAL FACTORS WERE MORE ACCURATE THAN THOSE ADJUSTED BY MONTHLY SEASONAL FACTORS, AND (5) ADT ESTIMATES USING THE AREA CONTROL METHOD WERE GENERALLY LESS ACCURATE THAN ADT ESTIMATES USING THE SECTIONAL CONTROL METHOD, BUT THE VARIANCE WAS NOT SERIOUS. /AUTHOR/

  • Record URL:
  • Supplemental Notes:
    • No 303, pp 25-47, 9 FIG, 8 TAB, 7 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
  • Authors:
    • Head, J A
    • Blensly, R C
  • Conference:
  • Publication Date: 1961

Language

  • English

Media Info

  • Media Type: Digital/other
  • Monograph Title: Motor vehicle speed, volume, weight and travel times
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00227784
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:36AM