Dijkstra's Algorithm On-Line: An Empirical Case Study from Public Railroad Transport
WAE '99 Proceedings of the 3rd International Workshop on Algorithm Engineering
Computing the shortest path: A search meets graph theory
SODA '05 Proceedings of the sixteenth annual ACM-SIAM symposium on Discrete algorithms
Geometric containers for efficient shortest-path computation
Journal of Experimental Algorithmics (JEA)
Engineering highway hierarchies
ESA'06 Proceedings of the 14th conference on Annual European Symposium - Volume 14
Studying (non-planar) road networks through an algorithmic lens
Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
The Shortcut Problem --- Complexity and Approximation
SOFSEM '09 Proceedings of the 35th Conference on Current Trends in Theory and Practice of Computer Science
SHARC: Fast and robust unidirectional routing
Journal of Experimental Algorithmics (JEA)
Engineering Route Planning Algorithms
Algorithmics of Large and Complex Networks
WEA'07 Proceedings of the 6th international conference on Experimental algorithms
WEA'07 Proceedings of the 6th international conference on Experimental algorithms
Contraction hierarchies: faster and simpler hierarchical routing in road networks
WEA'08 Proceedings of the 7th international conference on Experimental algorithms
Highway dimension, shortest paths, and provably efficient algorithms
SODA '10 Proceedings of the twenty-first annual ACM-SIAM symposium on Discrete Algorithms
Highway hierarchies hasten exact shortest path queries
ESA'05 Proceedings of the 13th annual European conference on Algorithms
Exact distance oracles for planar graphs
Proceedings of the twenty-third annual ACM-SIAM symposium on Discrete Algorithms
Multiobjective heuristic search in road maps
Expert Systems with Applications: An International Journal
Algorithm engineering for route planning: an update
ISAAC'11 Proceedings of the 22nd international conference on Algorithms and Computation
Exact Routing in Large Road Networks Using Contraction Hierarchies
Transportation Science
On optimal preprocessing for contraction hierarchies
Proceedings of the 5th ACM SIGSPATIAL International Workshop on Computational Transportation Science
Search-Space size in contraction hierarchies
ICALP'13 Proceedings of the 40th international conference on Automata, Languages, and Programming - Volume Part I
Shortest-path queries in static networks
ACM Computing Surveys (CSUR)
Subset selection of search heuristics
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
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During the last years, preprocessing-based techniques have been developed to compute shortest paths between two given points in a road network. These speed-up techniques make the computation a matter of microseconds even on huge networks. While there is a vast amount of experimental work in the field, there is still large demand on theoretical foundations. The preprocessing phases of most speed-up techniques leave open some degree of freedom which, in practice, is filled in a heuristical fashion. Thus, for a given speed-up technique, the problem arises of how to fill the according degree of freedom optimally. Until now, the complexity status of these problems was unknown. In this work, we answer this question by showing NP-hardness for the recent techniques.