Impact of Left-Turn Spillover on Through Movement Discharge at Signalized Intersections
Identifieur interne : 000422 ( Main/Merge ); précédent : 000421; suivant : 000423Impact of Left-Turn Spillover on Through Movement Discharge at Signalized Intersections
Auteurs : Abigail Osei-Asamoah [États-Unis] ; Ashish Kulshrestha [États-Unis] ; Scott S. Washburn [États-Unis] ; YAFENG YIN [États-Unis]Source :
- Transportation research record [ 0361-1981 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Réseau routier, Simulation, Recommandation.
English descriptors
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Abstract
While the Highway Capacity Manual (HCM) 2000 does provide a separate procedure to estimate the back of queue for a lane group, its signalized intersection analysis procedure does not explicitly account for the impact to through movement traffic as a result of left-turn bay spillover. If the HCM methodology is used for an analysis of an intersection approach where left-turn spillover interferes with the discharge of through vehicles, the estimated delay results, and corresponding level of service, will be overly optimistic. Thus, the objective of this study was to determine the factors that significantly affect left-turn lane spillover and develop a model, or models, to predict the expected through movement capacity and discharge rate as a function of this spillover. Two approaches were used in this study: an analytical approach that developed a probability of left-turn spillover equation to incorporate into a capacity estimation equation, and an empirical approach incorporating the use of microsimulation to develop equations to estimate through movement discharge as a function of left-turn spillover. The developed probabilistic model was an enhancement to one from the literature. However, its accuracy of estimation was still limited due to the issue of intercycle queue-formation dependencies not being taken into account. The two models developed from regression analysis of simulation data-one for intersection approaches with only a single through lane and one for intersection approaches with multiple through lanes-replicate the simulation results quite reasonably.
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Washburn</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Civil and Coastal Engineering, University of Florida</s1><s2>Gainesville, FL 32611-6580.</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Yafeng Yin" sort="Yafeng Yin" uniqKey="Yafeng Yin" last="Yafeng Yin">YAFENG YIN</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Civil and Coastal Engineering, University of Florida</s1><s2>Gainesville, FL 32611-6580.</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Transportation research record</title><title level="j" type="abbreviated">Transp. res. rec.</title><idno type="ISSN">0361-1981</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Transportation research record</title><title level="j" type="abbreviated">Transp. res. rec.</title><idno type="ISSN">0361-1981</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Application</term><term>Comparative study</term><term>Impact study</term><term>Intersection</term><term>Probabilistic model</term><term>Recommendation</term><term>Research program</term><term>Result</term><term>Road network</term><term>Road traffic</term><term>Simulation</term><term>Traffic flow</term><term>Traffic lights</term><term>Vehicle turning</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Réseau routier</term><term>Intersection</term><term>Trafic routier</term><term>Etude impact</term><term>Virage véhicule</term><term>Programme recherche</term><term>Modèle probabiliste</term><term>Ecoulement trafic</term><term>Application</term><term>Etude comparative</term><term>Résultat</term><term>Simulation</term><term>Recommandation</term><term>Feu signalisation</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Réseau routier</term><term>Simulation</term><term>Recommandation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">While the Highway Capacity Manual (HCM) 2000 does provide a separate procedure to estimate the back of queue for a lane group, its signalized intersection analysis procedure does not explicitly account for the impact to through movement traffic as a result of left-turn bay spillover. If the HCM methodology is used for an analysis of an intersection approach where left-turn spillover interferes with the discharge of through vehicles, the estimated delay results, and corresponding level of service, will be overly optimistic. Thus, the objective of this study was to determine the factors that significantly affect left-turn lane spillover and develop a model, or models, to predict the expected through movement capacity and discharge rate as a function of this spillover. Two approaches were used in this study: an analytical approach that developed a probability of left-turn spillover equation to incorporate into a capacity estimation equation, and an empirical approach incorporating the use of microsimulation to develop equations to estimate through movement discharge as a function of left-turn spillover. The developed probabilistic model was an enhancement to one from the literature. However, its accuracy of estimation was still limited due to the issue of intercycle queue-formation dependencies not being taken into account. The two models developed from regression analysis of simulation data-one for intersection approaches with only a single through lane and one for intersection approaches with multiple through lanes-replicate the simulation results quite reasonably.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Floride</li></region></list><tree><country name="États-Unis"><region name="Floride"><name sortKey="Osei Asamoah, Abigail" sort="Osei Asamoah, Abigail" uniqKey="Osei Asamoah A" first="Abigail" last="Osei-Asamoah">Abigail Osei-Asamoah</name></region><name sortKey="Kulshrestha, Ashish" sort="Kulshrestha, Ashish" uniqKey="Kulshrestha A" first="Ashish" last="Kulshrestha">Ashish Kulshrestha</name><name sortKey="Washburn, Scott S" sort="Washburn, Scott S" uniqKey="Washburn S" first="Scott S." last="Washburn">Scott S. Washburn</name><name sortKey="Yafeng Yin" sort="Yafeng Yin" uniqKey="Yafeng Yin" last="Yafeng Yin">YAFENG YIN</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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