An empirical model for estimating capacity of yield-controlled streams at a one-way minor street crossing a one-way major street was developed. For Jordan conditions, results of the empirical and gap acceptance models were compared. Data were collected from different cities in Jordan. The data consisted of 854 min of at-capacity operation and included both geometric and traffic characteristics. Also, for comparison purposes, data on critical gap and move-up time were collected. The results of analysis indicated that major traffic flow, visibility-to-speed ratio, and widths of the major and minor street had a significant effect on the capacity of each minor stream. For each minor stream, the results indicated that the traffic speed and the width of the major street significantly influenced the size of the critical gap. On the basis of field observations and results presented in this paper, gap acceptance models would significantly overestimate the capacity at low major traffic levels and underestimate at high levels. In addition, the results indicated that gap-acceptance models would provide unrealistic capacity values even if critical gaps are estimated for conditions in Jordan. Finally, a set of equations and figures were presented for practical applications.


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 9-15
  • Monograph Title: Traffic operations: highway capacity
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00713569
  • Record Type: Publication
  • ISBN: 0309061237
  • Files: TRIS, TRB, ATRI
  • Created Date: Nov 21 1995 12:00AM