Estimating capacity and delay at a single-lane approach, all-waystop-controlled intersection.

This paper presents the results of a study of single-lane approach, all-way stop-controlled intersections. Data have been collected for nearly 25 hr of operation for eight sites in Idaho, Oregon, and Washington. Estimates of the capacity and nature of the delay/flow rate relationship have been made for these sites. A methodology for analysing operational performance is proposed. This study is part of a larger effort where data have been collected for 23 all-way stop-controlled intersections in Idaho, Oregon, Washington, Iowa, Colorado, and Texas. In the next phase of this study, the effects of non-standard conditions (number of approach lanes, pedestrians, heavy vehicles, etc.) will be considered.