STUDY AND NUMERICAL MODELLING OF NON-STATIONARY TRAFFIC FLOW DEMANDS AT SIGNALIZED INTERSECTIONS

Empirical studies of traffic flow variations and theoretical analyses have been conducted in order to derive characteristics of traffic flow variability, particularly in relation to peak periods. The length of flow counting interval, t-r, as well as profiles of flow rate variations for peak periods have been determined. The flow profiles are based on a time scale divided into units t-r, within which demand flow is assumed as stationary. A computer simulation program has been developed for modelling of traffic flow with varying flow rates accordingly to an assumed curve. This program simulates the vehicle arrival process at an approach to fixed time traffic signals and calculates delays, stops, queue lengths, saturation ratios and their probalistic statistics, which charaterize level of service in the considered period of time. The primary application of this program lies in a simulation study of the effect of flow rate variability on the effectiveness of signal settings and estimation of traffic conditions during peak periods. (Author/TRRL)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 134-154

Subject/Index Terms

Filing Info

  • Accession Number: 00392081
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • ISBN: 90-6764-008-5
  • Files: ITRD, TRIS
  • Created Date: Apr 29 1985 12:00AM