Document Type

Conference Proceeding

Publication Date



Department of Mechanical Engineering-Engineering Mechanics


We study a Multiple Depot Heterogeneous Traveling Salesman Problem (MDHTSP) where the cost of the traveling between any two targets depends on the type of the vehicle. The travel costs are assumed to be symmetric, satisfy the triangle inequality, and are monotonic, i.e., the travel costs between any two targets monotonically increases with the index of the vehicles. Exploiting the monotonic structure of the travel costs, we present a 2-approximation algorithm based on the primal-dual method.

Publisher's Statement

© S. Rathinam, R. Ravi, J. Bae, and K. Sundar; licensed under Creative Commons License CC-BY. Publisher’s version of record:

Publication Title

Leibniz International Proceedings in Informatics, LIPIcs



Creative Commons License

Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.


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