Extensions of theoretical capacity models to account for special conditions

The computational procedures used to analyze two-way stop-controlled intersections were extended in the National Cooperative Highway Research Project 3-46 to account for a number of effects commonly observed at actual unsignalized intersections. This paper presents theoretical extensions that can ac...

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Bibliographic Details
Published in:Transportation research. Part A, Policy and practice Policy and practice, 1999-04, Vol.33 (3), p.217-236
Main Authors: Robinson, Bruce W., Tian, Zongzhong, Kittelson, Wayne, Vandehey, Mark, Kyte, Michael, Brilon, Werner, Wu, Ning, Troutbeck, Rod
Format: Article
Language:English
Subjects:
Flared approach
Gap acceptance
Highway capacity
Intersection
Left turn lane
Median storage
Pedestrian crossing shared lane
Platoon arrival impedance
Short lane
Stop control
Two stage
Two way
Unsignalized
Upstream signal
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Summary:The computational procedures used to analyze two-way stop-controlled intersections were extended in the National Cooperative Highway Research Project 3-46 to account for a number of effects commonly observed at actual unsignalized intersections. This paper presents theoretical extensions that can account for commonly observed phenomena, such as two-stage gap acceptance when median storage is available; right-turn “sneakers” at flared minor-street approaches; non-random arrivals caused by upstream signals; impedance due to pedestrian crossings; and delay to major-street through vehicles using shared left-turn and through lanes. The individual effects are then combined into an analytical framework suitable for inclusion in the Unsignalized Intersections procedures of the 1997 “Highway Capacity Manual”. ©
ISSN:0965-8564
1879-2375
DOI:10.1016/S0965-8564(98)00042-1