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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Sherif Shokry, Shinji Tanaka, Fumihiko Nakamura, Ryo Ariyoshi and Shino Miura
Full-Text PDF XML 736 Views
DOI:10.17265/2328-2142/2018.04.004
Affiliation(s)
Graduate School of Urban Innovation, Yokohama National University, Yokohama 240-8501, Japan
ABSTRACT
As one of the UAIDs (unconventional
alternative intersection designs), DLTs (displaced left-turn crossovers) have
been presented to mitigate traffic congestion. Although, qualitatively and quantitatively isolated UAIDs
outperform
their conventional counterparts, there is no simplified procedure to consider the DLTs
coordination. Hence, this research
investigates the coordination of consecutive DLTs under heterogeneous traffic
conditions. To achieve the optimal coordination and provide an efficient
coordination control, a
bandwidth maximization progression approach was used. Seeking the optimal
offset for each pair of consecutive intersections to guarantee the green
bandwidth waves along the coordinated corridor, a mixed-integer linear program
was adopted. The optimization problem was formulated and solved based on the
standard branch-and-bound technique. As a real-world study case, data of three
typical intersections located in an arterial corridor in Cairo, Egypt was used.
PTV-VISSIM as a microsimulation platform was employed to simulate and evaluate
the different signal timing plans. However, to represent the heterogeneous
traffic characteristics as close as possible to the reality, different
simulation parameters were tuned and validated carefully. The results
emphasized the undoubted improvement of coordinated DLTs by different
operational performance indices. The total travel time, average delay, the
number of stops per vehicle were obviously improved.
KEYWORDS
Displaced left-turn crossovers, signal coordination, bandwidth maximization.
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