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Zhou H.,Urban and Rural Planning and Design Institute of Jiangxi Province | Zhang X.,Tianjin Urban Planning and Design Institute | Wei Z.,Shenzhen Urban Transport Planning Center Co.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2014

From studying the status quo of transport carbon dioxide emissions charges and congestion pricing at home and abroad, this paper analyzes the characteristics of the urban transport carbon dioxide emissions, based on the summary of domestic and international carbon tax standard, it establishes a model of urban transport carbon emissions charges. Considering carbon emission costs as one part of the generalized travel costs, thereby a congestion pricing bilevel programming model is established. Then it selects the actual case to verify the rationality and feasibility of the model, and also put forward reasonable proposals for China's urban traffic congestion pricing.

Ran J.,Nanjing Southeast University | Guo X.,Nanjing Southeast University | Chen Y.,Shenzhen Urban Transport Planning Center Co. | Yang Z.,Nanjing Southeast University | And 2 more authors.
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | Year: 2011

To explore the distribution characters of dynamic parking demands, an analysis method of clustering non-parameter tests is proposed. Multi-period random variables are aggregated according to the sequence of single, group, cluster, and relative non-parameter tests are used during different aggregation phases to validate results, with an aim to obtain models of proper amount to describe dynamic random variables' distribution character and assure the fitting precision simultaneously. Based on the method, the research process of dynamic parking demands' distribution character is introduced from four aspects such as definition of the problem, collection of data, treatment and analysis of data, and conclusion of the distribution characters. The New World Center in Nanjing is taken as a case study. The dynamic parking demands' distribution characters of the accessory parking lot during workday is effectively explored and the variation of the distribution characters is concluded based on the acquired ten Poisson distribution models and seven Gamma distribution models.

Lu K.,South China University of Technology | Xu J.-M.,South China University of Technology | Zheng S.-J.,South China University of Technology | Li L.,Shenzhen Urban Transport Planning Center Co.
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | Year: 2012

The equations describing the relationship of phase difference adjustment quantities were established for intersection before and after transition. Considering the allowable range of each intersection's signal cycle length in transition period, the single-cycle symmetrical adjustment transition algorithm and the N-cycle weighted adjustment transition algorithm were proposed based on the minimax principle of offset adjustment ratio. Analysis result shows that when the symmetrical adjustment transition algorithm is finished in one cycle, and the actual maximum adjustment of intersection phase difference is minimized. The weighted adjustment transition algorithm comprehensively consider the allowable range of each intersection's transition signal cycle, and can make a coordinated control scheme rapidly and smoothly transit to a new coordinated control scheme after N transition signal cycles based on the minimum requirement of the maximum adjustment ratio of phase difference. Compared with other transition algorithms, the global optimization of phase difference adjustment for all intersections in control area can be realized by the weighted adjustment transition algorithm, which better satisfy the control demands of different signal intersections, so the weighted adjustment transition algorithm is more practical and has a broader application scope.

Gong Y.,Harbin Institute of Technology | Gong Y.,Peking University | Liu Y.,Peking University | Lin Y.,Harbin Institute of Technology | And 4 more authors.
Proceedings - 2012 20th International Conference on Geoinformatics, Geoinformatics 2012 | Year: 2012

Understanding the characteristics of intra-urban trips is essential to get a deep insight of the dynamic aspects of urban system and to make urban planning. We explore the spatiotemporal patterns of human intra-urban trips using metro smartcard records of Shenzhen city. Through statistics of millions of smartcard records, we found that the intra-urban trips: (a) have two significant peak hours over day; (b) are different between weekday and weekend; and (c) have significant periodicity. The temporal patterns owe to the living and working habit of the inhabitants. The result also shows that passengers' volumes, as well as the spatiotemporal patterns, are various for different stations, due to the land uses around stations. The method shows that metro smartcard records provide a powerful approach to understanding the dynamic of urban system. © 2012 IEEE.

Chen Z.,Shenzhen Urban Transport Planning Center Co. | Cheng L.,Nanjing Southeast University | Song J.,Shenzhen Urban Transport Planning Center Co.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2012

The calculation procedure includes the collection of traffic data, conversion of traffic volume, calculation of the number of queuing vehicles and the average queuing length. A real example is then given to make a comparison with the existing method. The computational result shows that the method discussed in this paper is more reasonable and the resulted length accords with the practical requirements.

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