In Transit to Constant Time Shortest-Path Queries in Road Networks (CROSBI ID 533429)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bast, Holger ; Funke, Stefan ; Matijević, Domagoj ; Sanders, Peter ; Schultes, Dominik
engleski
In Transit to Constant Time Shortest-Path Queries in Road Networks
When you drive to somewhere ‘ far away’ , you will leave your current location via one of only a few ‘ important’ traffic junctions. Starting from this informal observation, we develop an algorithmic approach— transit node routing— that allows us to reduce quickest-path queries in road networks to a small number of table lookups. We present two implementations of this idea, one based on a simple grid data structure and one based on highway hierarchies. For the road map of the United States, our best query times improve over the best previously published figures by two orders of magnitude. Our results exhibit various trade-offs between average query time (5 μ s to 63 μ s), preprocessing time (59min to 1200min), and storage overhead (21 bytes/node to 244 bytes/node).
shortest paths
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Podaci o prilogu
46-59-x.
2007.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of 9th Workshop on Algorithm Enginneering and Experiments
Applegate, David ; Brodal, Gerth
Philadelphia (PA): SIAM
Podaci o skupu
Nepoznat skup
predavanje
29.02.1904-29.02.2096