Abstract
This paper studies vehicle routing problems on asymmetric metrics. Our starting point is the directed k -TSP problem: given an asymmetric metric (V,d), a root r ∈ V and a target k ≤ |V|, compute the minimum length tour that contains r and at least k other vertices. We present a polynomial time O(log2 n·logk)-approximation algorithm for this problem. We use this algorithm for directed k-TSP to obtain an O(log2 n)-approximation algorithm for the directed orienteering problem. This answers positively, the question of poly-logarithmic approximability of directed orienteering, an open problem from Blum et al.[2]. The previously best known results were quasi-polynomial time algorithms with approximation guarantees of O(log2 k) for directed k-TSP, and O(logn) for directed orienteering (Chekuri & Pal [4]). Using the algorithm for directed orienteering within the framework of Blum et al.[2] and Bansal et al.[1], we also obtain poly-logarithmic approximation algorithms for the directed versions of discounted-reward TSP and the vehicle routing problem with time-windows.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bansal, N., Blum, A., Chawla, S., Meyerson, A.: Approximation Algorithms for Deadline-TSP and Vehicle Routing with Time Windows. In: Proceedings of the 36th Annual ACM Symposium on Theory of Computing, pp. 166–174 (2004)
Blum, A., Chawla, S., Karger, D.R., Lane, T., Meyerson, A., Minkoff, M.: Approximation Algorithms for Orienteering and Discounted-Reward TSP. In: Proceedings of the 44th Annual IEEE Symposium on Foundations of Computer Science, pp. 46–55 (2003)
Chekuri, C., Korula, N., Pal, M.: Improved Algorithms for Orienteering and Related Problems. Manuscript (2007)
Chekuri, C., Pal, M.: A recursive greedy algorithm for walks in directed graphs. In: Proceedings of the 46th Annual IEEE Symposium on Foundations of Computer Science, pp. 245–253 (2005)
Desrochers, M., Desrosiers, J., Solomon, M.: A New Optimization Algorithm for the Vehicle Routing Problem with Time Windows. Operation Research 40, 342–354 (1992)
Frank, A.: On Connectivity properties of Eulerian digraphs. Annals of Discrete Mathematics 41 (1989)
Frieze, A., Galbiati, G., Maffioli, F.: On the worst-case performance of some algorithms for the asymmetric travelling salesman problem. Networks 12, 23–39 (1982)
Goemans, M.X., Bertsimas, D.J.: On the parsimonious property of connectivity problems. In: Proceedings of the 1st annual ACM-SIAM symposium on Discrete algorithms, pp. 388–396 (1990)
Golden, B.L., Levy, L., Vohra, R.: The Orienteering Problem. Naval Research Logistics 34, 307–318 (1987)
Haimovich, M., Rinnooy, A.H.G.: Bounds and heuristics for capacitated routing problems. Mathematics of Operations Research 10, 527–542 (1985)
Held, M., Karp, R.M.: The travelling salesman problem and minimum spanning trees. Operations Research 18, 1138–1162 (1970)
Jackson, B.: Some remarks on arc-connectivity, vertex splitting, and orientation in digraphs. Journal of Graph Theory 12(3), 429–436 (1988)
Kantor, M., Rosenwein, M.: The Orienteering Problem with Time Windows. Journal of the Operational Research Society 43, 629–635 (1992)
Kohen, A., Kan, A.R., Trienekens, H.: Vehicle Routing with Time Windows. Operations Research 36, 266–273 (1987)
Li, C.-L., Simchi-Levi, D., Desrochers, M.: On the distance constrained vehicle routing problem. Operations Research 40, 790–799 (1992)
Mader, W.: Construction of all n-fold edge-connected digraphs (German). European Journal of Combinatorics 3, 63–67 (1982)
Nemhauser, G.L., Wolsey, L.A.: Integer and Combinatorial Optimization (1999)
Savelsbergh, M.: Local Search for Routing Problems with Time Windows. Annals of Operations Research 4, 285–305 (1985)
Savelsbergh, M.W.P., Sol, M.: The general pickup and delivery problem. Transportation Science 29, 17–29 (1995)
Tan, K.C., Lee, L.H., Zhu, K.Q., Ou, K.: Heuristic Methods for Vehicle Routing Problems with Time Windows. Artificial Intelligence in Engineering, pp. 281–295 (2001)
Vempala, S., Yannakakis, M.: A convex relaxation for the asymmetric tsp. In: Proceedings of the 10th annual ACM-SIAM symposium on Discrete algorithms, pp. 975–976 (1999)
Williamson, D.: Analysis of the held-karp heuristic for the traveling salesman problem. Master’s thesis, MIT Computer Science (1990)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Nagarajan, V., Ravi, R. (2007). Poly-logarithmic Approximation Algorithms for Directed Vehicle Routing Problems. In: Charikar, M., Jansen, K., Reingold, O., Rolim, J.D.P. (eds) Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques. APPROX RANDOM 2007 2007. Lecture Notes in Computer Science, vol 4627. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74208-1_19
Download citation
DOI: https://doi.org/10.1007/978-3-540-74208-1_19
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-74207-4
Online ISBN: 978-3-540-74208-1
eBook Packages: Computer ScienceComputer Science (R0)