Comparison of Two Transportation Network Equilibrium Modeling Approaches

Hasan, Mohamad K.; Safwat, K Nabil A

doi:10.1061/(asce)0733-947x(2000)126:1(35)

Cited by 9 publications

(9 citation statements)

References 9 publications

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“…During the last two decades several combined models have been implemented that solve multiclass combined network equilibrium problems, including research by Lam and Huang (1994), Boyce and Bar-Gera (2001, 2003), De Cea and Fernandez (2001), De Cea et al (2003; see Boyce and Bar-Gera (2004) for a recent review. Several comparative studies have been performed, showing the advantages of solving a combined model versus applying the sequential procedure; see Boyce et al (1994), Barquín (1992) and Hasan and Safwat (2000). Finally, Williams and Lam (1991), Williams and Lai (1991) and have explored in detail the equilibration properties of the sequential procedure with respect to highway investment and multi-modal systems.…”

mentioning

confidence: 99%

Comparisons of Urban Travel Forecasts Prepared with the Sequential Procedure and a Combined Model

Siegel¹,

Fernández

et al. 2006

Netw Spat Econ

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Detailed analyses and comparisons of urban travel forecasts prepared by applying the state-of-practice sequential procedure and the solution of a combined network equilibrium model are presented. The sequential procedure for solving the trip distribution, mode choice and assignment problems with feedback is the current practice in most transportation planning agencies, although its important limitations are well known. The solution of a combined model, in contrast, results from a single mathematical formulation, which ensures a well-converged and consistent result. Using a real network, several methods for solving the sequential procedure with feedback are compared to the solution of the combined model ESTRAUS. The results of these methods are shown to have various levels of instability. The paper concludes with a call for a new paradigm of travel forecasting practice based on an internally consistent model formulation that can be solved to a level of precision suitable for comparing alternative scenarios. Copyright Springer Science + Business Media, LLC 2006Combined network equilibrium models, Sequential procedure, Urban travel forecasting,

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mentioning

confidence: 99%

Comparisons of Urban Travel Forecasts Prepared with the Sequential Procedure and a Combined Model

Siegel¹,

Fernández

et al. 2006

Netw Spat Econ

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“…Florian et al (1979) at the University of Montreal implemented a two-mode equilibrium model with fixed origin-destination trip tables, following a validation effort for the traffic assignment problem for Winnipeg (Florian and Nguyen 1976) and a formulation of a two-mode model (Florian 1977). A combined model that included trip generation was proposed by Safwat and Magnanti (1988), and was implemented with data for Texas cities and Riyadh, Saudi Arabia by Safwat and Hasan (1989), Hasan and AlGadhi (1998) and Hasan and Safwat (2000).…”

Section: Implementation and Validation Of Network Equilibrium Modelsmentioning

confidence: 99%

Forecasting Travel on Congested Urban Transportation Networks: Review and Prospects for Network Equilibrium Models

Boyce

2007

Netw Spat Econ

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The historical origins, development and application of traffic network equilibrium models with variable origin–destination flows are examined in this review. The original formulation and analysis of this model during 1952–1955 by Beckmann, McGuire and Winsten at the Cowles Commission for Research in Economics is the starting point for the review. Subsequent research building upon the original formulation is described, and contrasted with urban travel forecasting practice stemming from the same period. Additional model developments through the end of the twentieth century are then summarized, followed by a brief discussion of travel forecasting practice and software development stimulated by the original formulation. Copyright Springer Science+Business Media, LLC 2007urban travel forecasting, traffic network equilibrium, user-equilibrium route choice, traffic assignment, sequential procedure,

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“…In contrast to urban transportation, where the prediction of passenger flows over multimodal networks has been studied extensively and many of the research results have been transferred to practice (Safwat and Walton [1], Safwat and Hasan [2], Safwat [3] and [4], Safwat and Magnanti [5], Hasan [6], Hasan and Al-Gadhi [7], Hasan and Safwat [8], Florian [9] and [10]), the study of freight flows at the national, regional, or international level, perhaps due to the inherent difficulties and complexities of such problems, received less attention. A good review of freight transport modeling may be found in Friez and Harker.…”

Section: Introductionmentioning

confidence: 99%

“…In practice, the STEM model was applied to many real-world transportation systems. The most recent applications were on the urban transportation network of Tyler, Texas, U.S.A. (Hasan and Safwat [8]) and of Riyadh, Saudi Arabia (Hasan and Al-Gadhi [7]). Earlier applications included the intercity passenger travel in Egypt (Safwat [3] and [4]) and the urban transportation network of Austin, Texas, U.S.A. (Safwat and Walton [1]).…”

Section: Introductionmentioning

confidence: 99%

Application of International Freight Simultaneous Transportation Equilibrium Model to Sultanate of Oman

Hasan¹

2017

JSSM

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An implementation of the International Freight Simultaneous Transportation Equilibrium Model (IFSTEM) that developed in United Nations Economic and Social Commission for Western Asia (ESCWA), to the goods trade through the ports and lands of Sultanate of Oman is presented. Although some socio-economic variables, which are not available, were required for IFSTEM model calibration, some reasonable assumptions were made and it was good enough to draw the following main findings: the proposed alternative enhancement scenarios were four nested scenarios, i.e., each scenario included the previous one plus an additional enhancement. These four enhancement scenarios were analyzed against and compared with scenario (0), i.e., the reference "do nothing" scenario. The prediction results revealed that the estimated international trade flows (imports, exports and re-exports) for Oman were increased by more than 504% by 2040 compared to the present situation of the base year 2012. This increase would represent around 70% compared to the "do nothing" reference scenario by the year 2040 assuming that the average increase of international trade flows in the "do nothing" case would be around 4% annually during the analysis period from 2012 to 2040. The predictions of average total trip time and total cost per ton revealed an estimated decrease, compared to the reference scenario, by around 25% and 20% respectively. These results are internally consistent and represented reasonably significant improvements compared to the "do nothing" reference scenario.

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Comparison of Two Transportation Network Equilibrium Modeling Approaches

Cited by 9 publications

References 9 publications

Comparisons of Urban Travel Forecasts Prepared with the Sequential Procedure and a Combined Model

Comparisons of Urban Travel Forecasts Prepared with the Sequential Procedure and a Combined Model

Forecasting Travel on Congested Urban Transportation Networks: Review and Prospects for Network Equilibrium Models

Application of International Freight Simultaneous Transportation Equilibrium Model to Sultanate of Oman

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