Date of Award

Fall 1998

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Civil, Construction, and Environmental Engineering

First Advisor

Kuemmel, David A.

Second Advisor

Bryson, Robert W.

Third Advisor

Drakopoulos, Alex


Gap Acceptance at Two-Way Stopped Controlled Intersections was written to develop gap acceptance values for two-way stop-controlled intersections. The specific objective was to assemble critical gap values, utilizing statistical analysis, that may be compared to the newly created National data base which was used to produce a new set of capacity and level of service analysis procedures for two-way stop-controlled intersections presented in the recently updated Chapter 10 - Unsignalized Intersections of the Highway Capacity Manual. To accomplish this objective, a review of relevant domestic and foreign literature was conducted; minor street movement gap acceptance data was collected at six separate stop controlled intersections in the Milwaukee, Wisconsin metropolitan area; the field data was evaluated using three methods: Greenshield, Raff, and Logistic Transformation; and critical gap values were developed and compared to those presented in the current and past Highway Capacity Manuals. In addition to the critical gap values developed as part of this study, analysis of the gap acceptance data revealed that drivers that experience longer delays at the stop-line waiting for adequate gaps in traffic to complete their desired maneuver will tend to accept shorter gaps than drivers experiencing little or no delay.



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