Abstract
In the context of a rapid developing urban economy and the increasing number of motor vehicles, urban commuting transportation has witnessed a serious mismatch between the supply of and the demand for transportation network resources. In developing an urban multi-mode traffic network, using a urban traffic transfer hub to coordinate the transportation capabilities among different traffic networks is perceived to be highly effective for exploring the network transportation capacity of an entire transportation system, and improving travel efficiency and experiences for the public. Based on the super-network model, this paper develops a topological structure for a multi-mode traffic network, in which two typical combined travel modes are selected to establish the path impedance function for that network. Moreover, the multi-mode traffic allocation model and the solving algorithm are constructed in the research. The paper studies the impact of two types of factors related to the transfer capacity of passenger flows based on the regular traffic network of a bus-and-subway transfer hub using a sensitivity analysis of the transfer time and the associated penalty. The findings suggest that both changes in transfer walking time and the transfer penalty have no significant effect on the bus passenger flow.
Highlights
In recent years, urban traffic modes have been transforming from a single-mode network into a multi-mode traffic network composed of a subway rail network, conventional bus network and road network, which have formed a modern urban traffic system
The research has explored the influence of a transfer hub on the transfer capacity on passenger flows of the multi-mode traffic network and has selected practical cases to analyze the sensitivity of the transportation hub
A single traveler might not change the travel cost of their expected travel path. In this case, assuming travelers follow the first principle of Wardrop, the issue comes to the stochastic user equilibrium model (SUE) problem proposed by [15,16,17]
Summary
Urban traffic modes have been transforming from a single-mode network into a multi-mode traffic network composed of a subway rail network, conventional bus network and road network, which have formed a modern urban traffic system. The concept of the urban multi-mode traffic network is not a simple superposition of different traffic networks. Instead, it collaboratively connects those networks through the traffic transfer hub, producing a whole that is greater than the sum of the parts. ‘Bus + Subway’ is the most important combined transport mode in commuter travel, which facilitates a huge number of passenger flows transferring in urban multi-mode networks. Due to large increases in urban populations, current transportation hubs cannot meet the demand for passenger flow transfers in multi-mode networks. The research has explored the influence of a transfer hub on the transfer capacity on passenger flows of the multi-mode traffic network and has selected practical cases to analyze the sensitivity of the transportation hub.
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