MODELLING AND SENSITIVITY ANALYSIS OF UNCOORDINATED PAIRED INTERSECTIONS WITH LEFT-TURN BAYS
Left-turn bays are often installed on the road segment between paired intersections. Such left-turn bays may reduce the approach capacities and impact on one another. Four optimization models are put forward for uncoordinated paired intersections with left-turn bays. The phase effective green times...
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Veröffentlicht in: | Transport (Vilnius, Lithuania) Lithuania), 2020-05, Vol.35 (3), p.283-299 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Left-turn bays are often installed on the road segment between paired intersections. Such left-turn bays may reduce
the approach capacities and impact on one another. Four optimization models are put forward for uncoordinated paired intersections with
left-turn bays. The phase effective green times and the left-turn bay lengths are the decision variables, maximizing the intersection
capacities, minimizing the intersection delays and both of them are respectively regarded as different objective functions, and minimizing
the total delay for paired intersections is viewed as another objective function. The total capacity-to-delay ratio is defined to evaluate
the operations of paired intersections as a whole. Using the field data, the sensitivities of the optimized outcomes to the weighting factors
of the objective functions are analysed. To clarify the influences of different scenarios on traffic stream operations, seven scenarios are
tested using VISSIM. The interval estimation and hypothesis testing are used to analyse the simulated data. Three concrete models are
recommended to apply in practice with the procedure of model application being provided. The achievements can be applied to optimally
assign the temporal-spacial resources for paired intersections when left-turn bays need to be installed and coordinated signals do not need
to be considered. |
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ISSN: | 1648-4142 1648-3480 |
DOI: | 10.3846/transport.2020.12271 |