ResponsePath time not equal sum instruction times?

Open Source Routing Engine
1

Hi,

I find some routes where the total time of the route is not equal of sum of the time of the instructions. Is that expected?

Route: 256013 Sum Instructions: 236013

Thanks

2

Can you share your route? Did you use the GraphHopper Directions API or did you run your own instance of GraphHopper? And did you use the heading parameter? And maybe u_turn_costs? There is a known issue which leads to such a difference when the heading penalty is applied: Remove headingPenaltyMillis by easbar · Pull Request #2563 · graphhopper/graphhopper · GitHub

3

We use our own instance of GraphHopper. We are using u_turn_costs not the heading parameter.

The route is in Poland and goes
From: (52.2114486694336, 21.0230960845947)
To: (52.2108154296875, 21.0210456848145)

      turn_costs: true
      u_turn_costs: 20
4

Ok then this is it: The u_turn_costs (20s) are not accounted for in the instructions. There is also this todo in the code:

I think we can consider this a bug and I’ll open an issue on GitHub → Turn costs are not included in instruction times · Issue #2572 · graphhopper/graphhopper · GitHub

5

Thanks @easbar

6

(I fixed it here https://github.com/graphhopper/graphhopper/pull/2626 )

7

Thanks

8

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