期刊
TRANSPORTMETRICA B-TRANSPORT DYNAMICS
卷 11, 期 1, 页码 463-485出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/21680566.2022.2089271
关键词
Network partitioning; bi-modal urban networks; mode differentiation; NMFD; MFD; NFD
This paper investigates the partitioning problem of bi-modal networks and proposes a three-step partitioning algorithm based on NMFD. The role played by mode differentiation in bi-modal network partitioning is studied through the lens of speed-NMFDs.
Empirical studies have demonstrated the existence of a well-defined Network Macroscopic Fundamental Diagram (NMFD). Well-shaped NMFD, however, may not be a universal law because urban networks often display heterogeneous congestion distributions. Therefore, different algorithms have been proposed to partition a heterogeneous network into homogeneous sub-networks. These algorithms mainly consider uni-modal networks, despite the multi-modal nature of urban traffic flows. This paper is one of the first studies dedicated to the partitioning problem of bi-modal networks. First, a three-step partitioning algorithm is developed concerning NMFD-based applications. Second, the role played by mode differentiation in bi-modal network partitioning is investigated through the lens of speed-NMFDs. The results demonstrate that the algorithm performs well. Mode differentiation should be considered in the partitioning process while is defined differently in free-flow and saturated conditions. The links' lengths, bus stop distribution, speed limit zone, and the existence of bus terminals might affect speed-NMFD properties.
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