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	1. Modeling stochastic multiple equilibrium behaviors on urban traffic networks
	ZHAO Hui,GAO Ziyou
	Transportation Engineering 06 December 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In this paper, multiple traffic equilibrium with both competition and cooperation behaviors in stochastic environments is concentrated. Three different types of players, including Stochastic User Equilibrium (SUE) player, Stochastic System Optimum (SSO) player and Stochastic Cournot-Nash (SCN) player are simultaneously considered when the players are presumed to make routing decision with other players' perceptions of travel times. By formulating the stochastic multiple equilibrium as Variational Inequalities (VI), the multiple routing behaviors on urban networks is analyzed. Diagonalization technique is adopted to solve the VI problem arisen form the multiple traffic equilibrium model. And numerical examples are included to demonstrate the proposed models.
	TO cite this article:ZHAO Hui,GAO Ziyou. Modeling stochastic multiple equilibrium behaviors on urban traffic networks[OL].[ 6 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4501284


	2. Reliability of estimating equilibrium speed-spacing relation with trajectory data
	WANG Hao,YANG Wanbo
	Transportation Engineering 23 November 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:This paper studies the reliability of estimating the equilibrium speed-spacing relationship from the dynamic trajectory data. Empirical trajectories with long durations are used to extract the near equilibrium data and the dynamic trajectory data. Two car-following models, the Optimal Velocity Model (OVM) and the Intelligent Driver Model (IDM) are applied for the model calibration from the individual trajectory. A root mean square error based indicator is introduced to measure the performance of the model estimation for the equilibrium speed-spacing relationship. Seven factors that influence the model estimation are presented, and the correlations between factors and estimation performance are analyzed based on the ordered logistic regression. It is found that the OVM performs the best in estimating the equilibrium speed-spacing relationship. The results of ordered logistic regression indicate that long trajectory duration and multiple dynamic types are beneficial to the reliability of the estimation for the equilibrium speed-spacing relationship.
	TO cite this article:WANG Hao,YANG Wanbo. Reliability of estimating equilibrium speed-spacing relation with trajectory data[OL].[23 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4496494


	3. Tradable credits for congestion management with mixed equilibrium behaviors
	ZHAO Hui,ZHANG Cuiping,SUN Huijun,GAO Ziyou
	Transportation Engineering 22 November 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In this paper, we investigate the tradable credit scheme for a transportation system with multiple equilibrium behaviors in congestion management. The target system contains user equilibrium (UE), Cournot-Nash equilibrium (CNE) and market equilibrium (ME) simultaneously. The UE-CNE and ME conditions can be formulated into an equivalent Variational Inequality Problem (VIP) and the solution's existence and uniqueness properties are discussed. Furthermore, the uniqueness of credit price is also presented. By transferring the tradable credit design problem into an equivalent quadratic programming problem, we design an appropriate tradable credit scheme to decentralize system optimal network flow patterns. Applications of the proposed model are illustrated with numerical results.
	TO cite this article:ZHAO Hui,ZHANG Cuiping,SUN Huijun, et al. Tradable credits for congestion management with mixed equilibrium behaviors[OL].[22 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4495617


	4. Mortar fatigue model for meso-mechanical mixture design of ravelling resistant porous asphalt concrete
	L.T. Mo,M. Huurman,S.P. Wu,A.A.A. Molenaar
	Transportation Engineering 30 October 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:This paper presents the development of a practical mortar fatigue model on the basis of the dissipated energy concept. A specially designed test setup was developed for characterization of mortar fatigue at meso-scale by means of Dynamic Shear Rheometer (DSR). Test results showed that mortar fatigue models based on the dissipated energy concept can be developed for the purpose of life predictions under complex loading conditions. The dissipated energy per cycle in the initial phase of fatigue tests is a much more practical indicator for fatigue life determination purposes than the total energy dissipated during a fatigue test. Since a mortar fatigue model based on the initial dissipated energy per cycle was adopted, effects of complex stress and strain signals can be taken into account.
	TO cite this article:L.T. Mo,M. Huurman,S.P. Wu, et al. Mortar fatigue model

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