DOI: 10.3724/SP.J.1249.2018.02206

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:2 PP.206-212

Evaluation of traffic demand control by considering the saturation of bottleneck links

Considering the traffic paradox phenomenon, which is the decrease of origin-destination (OD) traffic volume may lead to flow increase on certain links of road network, we analyze the necessity of the saturation of bottleneck links that are used as an index to evaluate the traffic demand control. We propose an evaluation method by analyzing three indexes including road-network total cost, road-network mean saturation and the saturation of bottleneck links,comprehensively. We build a bi-level mathematical programming model and develop the solving algorithm. Taking the Nguyen-Dupuis network as an example, we design 15 schemes to conduct 11 pairs of numerical experiments and analyze the variations of three indexes with the changes of different intensities of traffic demand control in every scheme. The results indicate that the differences of the indexes of road-network total cost and mean saturation among the designed schemes are within 2.25%, which is not great. Oppositely, the differences of the saturation index of the bottleneck links among the designed schemes are great and the maximum difference reaches 7.65%. Moreover, some schemes may lead to more serious congestion in bottleneck links, which further proves the importance of considering the saturation of bottleneck links. Finally, the reason of the saturation variation of the bottleneck links is investigated by analyzing the change of the path flow.

Key words:transportation engineering and management,traffic demand control,the saturation of bottleneck link,traffic paradox,bi-level mathematical programming model,method of successive average

ReleaseDate:2018-03-20 15:26:58

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