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[SOTM10] Geovelo, a route planner for bicycle

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  • 1. Geovelo, a route planner for bicycle Geovelo, a route planner for bicycle G. Sauvanet, E. Neron, H. Baptiste ´ Laboratoire d’Informatique Universit´ Francois Rabelais Tours e Polytech’Tours - D´partement Informatique e 64, Avenue Jean Portalis 37200 Tours FRANCE 11 juillet 2010 G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 1
  • 2. Geovelo, a route planner for bicycle Outline 1 Presentation 2 The Bi-Objective Shortest Path problem Modeling a road network Mono-objective problem Bi-objective problem 3 Conclusion G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 2
  • 3. Geovelo, a route planner for bicycle Presentation Context PhD CIFRE LI/Association Autour du Train (March 2008) Autour du Train : promoting alternative modes of travel like bicycle Today : no route planner really adapted to the bicycle in France Geovelo available on 3 cities (Paris, Nantes, Tours) Database : Postgresql/Postgis, OSM Data, Osmosis Website : Cloudmade maps, Openlayers Multi-objective routing engine G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 3
  • 4. Geovelo, a route planner for bicycle Presentation G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 4
  • 5. Geovelo, a route planner for bicycle Presentation G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 4
  • 6. Geovelo, a route planner for bicycle Outline 1 Presentation 2 The Bi-Objective Shortest Path problem Modeling a road network Mono-objective problem Bi-objective problem 3 Conclusion G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 5
  • 7. Geovelo, a route planner for bicycle Modeling a road network Let G = (V , A) be a graph with : V the set of nodes, A the set of arcs, the cost function distance : A → R+ insecurity : A → R+ G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 6
  • 8. Geovelo, a route planner for bicycle Modeling a road network Let G = (V , A) be a graph with : V the set of nodes, A the set of arcs, the cost function distance : A → R+ insecurity : A → R+ G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 6
  • 9. Geovelo, a route planner for bicycle Modeling a road network Let G = (V , A) be a graph with : V the set of nodes, A the set of arcs, the cost function distance : A → R+ insecurity : A → R+ G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 6
  • 10. Geovelo, a route planner for bicycle Modeling a road network Let G = (V , A) be a graph with : V the set of nodes, A the set of arcs, the cost function distance : A → R+ insecurity : A → R+ G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 6
  • 11. Geovelo, a route planner for bicycle Modeling a road network Let G = (V , A) be a graph with : V the set of nodes, A the set of arcs, the cost function distance : A → R+ insecurity : A → R+ G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 6
  • 12. Geovelo, a route planner for bicycle Presentation of the mono-objective problem Mono-objective problem Let us define : a graph G , a start node s and a target node t. G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 7
  • 13. Geovelo, a route planner for bicycle Presentation of the mono-objective problem Mono-objective problem Let us define : a graph G , a start node s and a target node t. Goal : compute shortest path p linking s to t ie min a∈p distance(a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 7
  • 14. Geovelo, a route planner for bicycle Presentation of the mono-objective problem Mono-objective problem Let us define : a graph G , a start node s and a target node t. Goal : compute shortest path p linking s to t ie min a∈p distance(a) Experiments on a graph with 136 199 nodes and 345 267 arcs : Dijkstra algorithm average of 0.1 seconde on 100 routes. G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 7
  • 15. Geovelo, a route planner for bicycle Presentation of the bi-objective problem Bi-objective problem 2 objectives : minimize distance and insecurity 2 conflicting objectives ⇒ shortest route is often adapted for the car, so it is dangerous for bicycle Insecurity of a path = sum of the insecurity of each arc of the path Insecurity = distance . insecurity coefficient (inspired from dangerous material transportation) insecurity coefficient depends on the nature of an arc : bicycle path, bike lane, no facilities, etc. G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 8
  • 16. Geovelo, a route planner for bicycle Presentation of the bi-objective problem Problem Solving bi-objective shortest path problem is hard Not an unique path, but a set of efficient paths Example on Paris : > 500 efficient paths and computation time > 1 minute Basic solution Transform bi-objective problem in mono-objective problem Linear combination of distance and insecurity : new cost(a) = α.distance(a) + (1 − α).insecurity (a) ⇒ fast and used by many (all ?) route planner, but not really good G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 9
  • 17. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 10
  • 18. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 10
  • 19. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 11
  • 20. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 12
  • 21. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 13
  • 22. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 14
  • 23. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 15
  • 24. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 25. Geovelo, a route planner for bicycle Presentation of the bi-objective problem new cost(a) = α1 .distance(a) + (1 − α1 ).insecurity (a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 26. Geovelo, a route planner for bicycle Presentation of the bi-objective problem new cost(a) = α1 .distance(a) + (1 − α1 ).insecurity (a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 27. Geovelo, a route planner for bicycle Presentation of the bi-objective problem new cost(a) = α2 .distance(a) + (1 − α2 ).insecurity (a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 28. Geovelo, a route planner for bicycle Presentation of the bi-objective problem new cost(a) = α2 .distance(a) + (1 − α2 ).insecurity (a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 29. Geovelo, a route planner for bicycle Presentation of the bi-objective problem new cost(a) = α3 .distance(a) + (1 − α3 ).insecurity (a) G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 30. Geovelo, a route planner for bicycle Presentation of the bi-objective problem G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 16
  • 31. Geovelo, a route planner for bicycle Research Our research 1 Compute all efficient paths : improvements of labeling algorithms for bi-objective problem [ROADEF 2009, MOPGP 2010] 2 Compute the best compromise path : [ISCO 2010, JMMA 2010] G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 17
  • 32. Geovelo, a route planner for bicycle Outline 1 Presentation 2 The Bi-Objective Shortest Path problem Modeling a road network Mono-objective problem Bi-objective problem 3 Conclusion G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 18
  • 33. Geovelo, a route planner for bicycle Conclusion Conclusion : Prototype works (http://www.geovelo.fr). Further work : user feedback on OSM data Test with more objectives (effort, tourist Interest...) Mobile version Let user set preferences of the routing engine G. Sauvanet, E. N´ron, H. Baptiste e SotM 2010 - Girona 19