Multiclass Cell Transmission Model for Heterogeneous Mobility in General Topology of Road Network

作者：Tuerprasert Kamonthep; Aswakul Chaodit^*

来源：Journal of Intelligent Transportation Systems: Technology, Planning, and Operations , 2010, 14(2): 68-82.

DOI：10.1080/15472451003719715

• cell transmission model
• heterogeneous mobility
• macroscopic model
• traffic network

This article is concerned with a mathematical generalization of macroscopic road network mobility model, the cell transmission model. The objective is to enhance the conventional single-class cell transmission model (S-CTM) to a more generalized multiclass cell transmission model (M-CTM). This latter model can take into account the mixed composition of vehicle classes (i.e., with distinct free-flow speed and vehicle length). The aim is to introduce head-of-cell and end-of-cell vehicles into the model. Cascading, merging, and diverging scenarios of cells for M-CTM have been formulated so that the model can be applied to a general topology of road network. Experimental results are provided to compare S-CTM and M-CTM in 6 network test cases with the microscopic simulatorMITSIMand to actual measurement of network traffic conditions. The results suggest that M-CTM is significantly more accurate than S-CTM in the tested networks with nonstationary vehicle composition, with platoon dispersions and with time-varying jam status. In addition, accuracy improvement of M-CTM is obtained without compromising the computational complexity. It is therefore expected that the proposed M-CTM would be well applicable in practice.

• 出版日期2010