DEVELOPMENT OF A METHOD OF ESTIMATING MISSING DATA IN THE FIELD OF AUTOMATIC COUNTING

ENTWICKLUNG EINER METHODE ZUR SCHAETZUNG FEHLENDER DATEN IM RAHMEN AUTOMATISCHER ZAEHLUNGEN

The aim of the programme was the development of a mathematical model which would facilitate the replacement of missing and defective values with estimated values. The basis of this development was the time dependent stability of the traffic flow at individual counting stations, as Evident from the annual evaluation of data. The analysis of data from automatic counters from 1970 to 1974 shows that if periods with similar traffic flow structures are considered, the daily rates of increase in flow vary little. A model was developed on the basis of data from a comparable year, which enables calculation to be made of the traffic flow rates x during periods in years with missing information, using the relation r between the average daily flow rates during this period in the two years. This enables an estimated daily flow on day x in the period V to be calculated from the function r and the daily flow rate for the respective day in the comparative year. Since the examination of the relative daily fluctuations showed that these were to a large extent constant over a large comparable period of time, the distribution of the daily flow rates could be expressed in hourly values. On the basis of the results of this programme a computer program for the automatic evaluation of missing data from traffic counters was developed. This was used to estimate the missing data from traffic counts in the years 1970 - 74 as a test. /TRRL/

  • Corporate Authors:

    Ministry of Building and Technology, Austria

    Stuberring 1
    A-1010 Vienna,   Austria 
  • Authors:
    • Steierwald, G
    • Pohnitzer, M
  • Publication Date: 1977

Language

  • German

Media Info

  • Features: Figures; Tables;
  • Pagination: 66 p.
  • Monograph Title: ENTWICKLUNG EINER METHODE ZUR SCHAETZUNG FEHLENDER DATEN IM RAHMEN AUTOMATISCHER ZAEHLUNGEN
  • Serial:
    • Strassenforschung
    • Issue Number: 73
    • Publisher: Ministry of Building and Technology, Austria

Subject/Index Terms

Filing Info

  • Accession Number: 00189382
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Report/Paper Numbers: Monog Ser
  • Files: ITRD, TRIS
  • Created Date: Mar 28 1979 12:00AM