MATSim congested network use

[federicobigi]

Goodmorning to all,
I am writing here as i am seeking some reccomendation on how to proceed for my current project.

Goal: I want to develop an api to extract travel time from MATSim simulations.

Current Solution: The obvious solution I found is to map all my agents travel time use a zoning system, compute the many/multiple OD matrices I need and go from there. Then, I would save the OD matrices, place them in a DB ready to be queried at command.

Issues: while this simplistic approach works, the problems I see are:

• I can get only centroid-to-centroid travel time, which is a good estimation but might lead to inaccuracies (what if my zones are too big?)
• I can only get accurate times of popular OD pairs, with the non-popular OD pair having the risk of higher inaccuracies.

This made me think: ideally, when I have my finished MATSim simulation, I could also get as an output the simulated congested network.

What if I can use this network to run a routing algorithm and extract the travel time from there directly?

Theoretically, this could work, and provide me with a much better estimation and customization options. The problem is that I don’t have a clue on where to start putting my hands on this.

Do you have any recommendation/reference that might help me with this quest?

Thank you very much!

[Janekdererste]

This is pretty much, what the MATSim router does. During re-planning it routes based on the travel times achieved during the previous simulated iteration.

The TravelTimeComparison class does a similar thing. It goes through an events file and produces a csv or a shape file with travel times per link. Maybe this could be a starting point for you.