01557749

Component

https://doi.org/10.3141/2487-10

Congestion downstream of a freeway off-ramp often causes the traffic queue to spill back to the main line and thus reduces freeway capacity at the interchange area. To prevent queue spillback, this study proposes a two-stage control model that optimizes the signal plans on an off-ramp connected arterial. The first stage of the model optimizes the green splits for the target intersections and their common cycle length with a specified queue length constraint. The second stage of the model decomposes the target arterial into two groups of segments: one for accommodating the heaving off-ramp turning flows and the other mainly for through traffic on the local arterial. With field data from the freeway interchange in Chupei, Taiwan, the study evaluates the performance with extensive simulation experiments and demonstrates the effectiveness of the proposed model for preventing queue spillbacks at the off-ramp and for minimizing the resulting impact on the freeway main line.

01580506

15-3565

English

pp 112–121

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369077

Print

Figures (9) ; References (20) ; Tables (3)

Arterial highways; Freeways; Off ramps; Optimization; Simulation; Traffic queuing; Traffic signal control systems

Spillback effects (Traffic)

Zhubei (Taiwan)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Dec 30 2014 1:11PM

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