Re: [sumo-user] shortest path exercise

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

The router is known to underestimate waiting times at traffic lights if the network doesn't have any other cars in it. 

You can use duarouter with the same trips as input and it will tell you the estimate traveltime, it should be lower for the route without a middle point. 

The next step would be to observe the trip in sumo-gui and check for any delays en route.

The routeLength being higher without a middle point might be due to different speed limits on the routes (the longer route with a higher speed limit could be faster from the point of view of the router).

If you cannot figure it out, please provide the inputs for an investigation.

Am Do., 18. Apr. 2024 um 16:14 Uhr schrieb Joan Carmona Mercadé via sumo-user <sumo-user@xxxxxxxxxxx>:

Hi,

 

I'm trying to find the shortest path between points A and B. I got my network from OSM. Then I create a simulation with a unique trip between A and B with no middle edges.

 

When I ask to Google, it gives me a route. But Sumo gives me a very different one. Then I modify the trip and add a middle edge from the route that Google gave to me. Then Sumo gives me the same route as Google.

 

If I check the values of output variables routeLength and duration, both values are greater in the first case (with no middle point). So, I don't understand why Sumo is giving me that route if it is longer and takes more time that the one with the middle edge.

 

What other parameters may I be forgetting?

 

Thanks,

Joan

 

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