Volume 49, Issue 4 pp. 553-567
Research Article
Free to Read

An augmented Lagrangian origin-based algorithm for link-capacitated traffic assignment problem

Feng Shi

Corresponding Author

Feng Shi

School of Traffic and Transportation Engineering, Central South University, Changsha, 410075 China

Correspondence to: Feng Shi, School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China. E-mail: [email protected]Search for more papers by this author
Guang-ming Xu

Guang-ming Xu

School of Traffic and Transportation Engineering, Central South University, Changsha, 410075 China

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Helai Huang

Helai Huang

School of Traffic and Transportation Engineering, Central South University, Changsha, 410075 China

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First published: 16 October 2014
Citations: 7

Summary

The origin-based algorithm is embedded into the augmented Lagrangian method for the link-capacitated traffic assignment problem. In order to solve the “nonexistence” problem due to the second partial derivatives of the augmented Lagrangian function at some specific points, the approximate expressions of the second partial derivatives are amended in the origin-based algorithm. The graph of last common nodes is developed on the basis of the restricted single-origin network. A method is proposed for finding n–1 last common nodes of the restricted single-origin network, resulting in computational complexity of O(n2) in finding last common nodes. Numerical analysis on the Sioux Falls network and Chicago Sketch network demonstrated the effectiveness and characteristics of the proposed algorithm. Copyright © 2014 John Wiley & Sons, Ltd.

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