Some factors affecting signalized intersection capacity
The estimates of saturation flow needed to calculate the capacity of a signalized intersection can be obtained in two basic ways. The first approach involves conducting field studies to measure saturation flows at the intersection(s) of interest. In this approach, capacity-influencing factors are empirically included, and the measured saturation flows represent the maximum capacity of the intersection approach under the prevailing conditions. The second approach to the problem involves the use of base saturation flow values, such as theoretical maximum values. These basic values can be adjusted to account for the physical and operating conditions of the particular intersection approaches being analyzed and used in intersection capacity studies. The assumption implicit in the use of base flow rates in capacity studies is that quantifiable relationships exist between saturation flows and the physical and operating characteristics of signalized intersections. Validation of this assumption has been, and continues to be, a source of considerable controversy.
- Research Organization:
- 6181000
- OSTI ID:
- 5905657
- Journal Information:
- ITE J.; (United States), Journal Name: ITE J.; (United States) Vol. 59:1; ISSN ITEJD
- Country of Publication:
- United States
- Language:
- English
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