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Article Dans Une Revue Transportation Research Record Année : 2016

Capacity drops at merges: analytical expressions for multilane freeways

Résumé

This paper deals with the derivation of analytical formulae to estimate the effective capacity at freeway merges in a multilane context. It extends two previous papers that are based on the same modeling framework but that are restricted to a single lane on the freeway (or to the analysis of the right lane only). The analytical expression for the one-lane capacity is recursively applied for all lanes. Lane-changing maneuvers (mandatory for the on-ramp vehicles and discretionary for others) are divided into two non-overlapping local merging areas. Discretionary lane-changes are transformed into a lane-changing flow using an appropriate analytical formula. This defines a system of equations whose unknowns are the capacity on all lanes and the inserting flow coming from the on-ramp. A sensitivity analysis shows that vehicle acceleration and the truck ratio are the most influential parameters for the total capacity. The analytical formulae are proven to match with numerical results from a traffic simulator that fully describes vehicle dynamics. Finally, they provide very good estimates when compared to experimental data for an active merge on the M6 freeway in UK.

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Autre
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Dates et versions

hal-01304455 , version 1 (19-04-2016)

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  • HAL Id : hal-01304455 , version 1

Citer

Ludovic Leclercq, Florian Marczak, Victor L. Knoop, Serge P. Hoogendoorn. Capacity drops at merges: analytical expressions for multilane freeways. Transportation Research Record, 2016, 14 p. ⟨hal-01304455⟩
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