unoptimized routing

[Tony S.]

Hello, I've set waitReluctance=0, walkReluctance=0, flexRouting=true. The result in the graph below seems very incoherent to me because there's a clear travel back that must be avoid. Can someone explain me this behavior and a suitable correction based on your experience, thank you very much!

[Leonard Ehrenfried]

Hi,

Things I would try:

- check that the stops in Ragusa are linked correctly to the street network. They might be "islands" and are inaccessible by foot. The debug layers will help with this.

- increase walkReluctance since the transfer in Ragusa involves less walking.

- check "Show filtered itineraries" and see if your desired one shows up there. If it does, check why it was filtered out.

Hope this helps.

--

  Leonard Ehrenfried

  ma...@leonard.io - https://leonard.io - @lehrenfried:matrix.org

On Mon, 18 Apr 2022, at 12:08, Tony S. wrote:

Hello, I've set waitReluctance=0, walkReluctance=0, flexRouting=true. The result in the graph below seems very incoherent to me because there's a clear travel back that must be avoid. Can someone explain me this behavior and a suitable correction based on your experience, thank you very much!

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[Tony S.]

Thank you Leonard. Actually the train station in Ragusa wasn't connected to the street network.

Bye

[Daniel Birch-Smith]

I think I may have a similar issue in a different area. OTP cannot find a walking route between these two points (-34.94382, 138.58314) (-34.94181, 138.58156).

What would be best practice to link the platform to the paths in OSM?

https://www.openstreetmap.org/edit#map=19/-34.94373/138.58339

I feel like it should be able to route from the bottom of the stairs, but what am I missing?

Thanks,

[Leonard Ehrenfried]

I took a look and yes, the stairs (https://www.openstreetmap.org/way/263050733) are not connected to the platform and therefore are a dead end.

The stairs need to "touch" the platform for routing engines to know that you can walk there. I've found an example of how to do it here: https://www.openstreetmap.org/way/302728886

Hint: if you want to debug connectivity problems, turn on the traversal permission layer in the layer switcher on the top right.

Hope this helps.

--

  Leonard Ehrenfried

  ma...@leonard.io - https://leonard.io - @lehrenfried:matrix.org

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[Daniel Birch-Smith]

Thanks for the quick and helpful reply. I'm sure that will fix the problem when I can get a new OSM download.

For the benefit of others reading this in the future, you can turn on the debug layers following the instructions here (https://docs.opentripplanner.org/en/latest/Troubleshooting-Routing/#debug-layers).

Is there an easy way to look at all potential problems like this across the whole map? I noticed the following output - does IsolatedStop relate to this problem, and is there a way to get more details?

[Leonard Ehrenfried]

If you configure the dataImportReport (see http://docs.opentripplanner.org/en/dev-2.x/BuildConfiguration/) you will get HTML output with all the issues found.

It takes a little practise so understand what the problem is but the information is all there.

--

  Leonard Ehrenfried

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