[pgrouting-users] routing with one way roads
Jose Carlos Martinez Llario
jomarlla at cgf.upv.es
Thu Dec 8 10:53:41 EST 2011
Hi I sent an email a couple of weeks ago, maybe I didnt write in a good
way because no one answered it.
I got same problems with Dijkstra too, it chose opposite ways even
though with a huge cost.
I can send the example if someone is interested, anyways Im afraid I can
not use pgrouting at least in 1.05 version with one way roads.
regards,
Jose
On 08/12/2011 16:46, John Williams wrote:
> I asked about this a few days ago and Steve mentioned that the
> shooting star algorithm for one-ways may be broken on 1.05. I switched
> to Dijkstra and everything works fine for me now...
>
> On Thu, Dec 8, 2011 at 9:29 AM, Mehmet Hilmi Elihos <elihos at gmail.com
> <mailto:elihos at gmail.com>> wrote:
>
> Hi to all,
>
> I'm trying to make routing with pg_routing algorithms.
> But i'm ahving problems with one way roads. Algorithm insists on
> using opposite directional roads even i'm using the biggest
> reverse_cost value.
>
> Here is the algorithm that i'm using.
>
> SELECT * FROM shortest_path_shooting_star(
> 'SELECT gid as id, class_id, source, target, length*c.cost
> as cost,
> x1, y1, x2, y2, rule, to_cost, reverse_cost*c.cost
> as reverse_cost
> FROM ways w, classes c
> WHERE class_id=c.id <http://c.id>', 1450296, 1468993,
> true, true);
>
> the algorithm always ignores the reverse_cost and insists on using
> opposite directional roads.
>
> Could you help me to solve this problem?
>
> You can find a snap_shot about this problem in the attachment.
>
> Thanks for your help
>
>
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