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Running the Île-de-France MATSim simulation

In order to run a simulation of Île-de-France in MATSIM, you first need to obtain or generate a synthetic population. Afterwards, the pipeline provides additional stages to create and run a full MATSim scenario including a digital road and public transport network.

This guide covers the following steps:

Gathering additional data

In this section we refere to the same data directory structure as described when gathering the data for the synthetic population.

I) Road network (OpenStreetMap)

The road network in the pipeline is based on OpenStreetMap data. A cut-out for Île-de-France is available from Geofabrik:

II) Public transit schedule (GTFS)

A digital public transport schedule for Île-de-France is available from Île-de-France mobilités:

  • Île-de-France GTFS
  • Go to Export, then download the csv file. Open the file, for instance in Excel, and obtain the URL for IDFM_gtfs. Download the zip file at this address.
  • Copy the IDFM_gtfs.zip into the folder data/gtfs.

Note that this schedule is updated regularly and only valid for the next three weeks. It is therefore a bit tricky to work with it, because the schedule varies strongly with external factors such as the collective strike during fall 2019 or the Covid-19 outbreak which is currently going on at the time of writing this documentation. Historical data sets are available from data.gouv.fr but we did not assess yet how long they are kept and if it is the same data set as the one from Île-de-France mobilités.

Overview

In your directory structure, there should now be the following additional files:

  • data/osm/ile-de-france-latest.osm.pbf
  • data/gtfs/IDFM_gtfs.zip

Running the simulation

The pipeline can be used to generate a full runnable MATSim scenario and run it for a couple of iterations to test it. For that, you need to make sure that the following tools are installed on your system (you can just try to run the pipeline, it will complain if this is not the case):

  • Java needs to be installed, with a minimum version of Java 8. In case you are not sure, you can download the open AdoptJDK.
  • Maven needs to be installed to build the necessary Java packages for setting up the scenario (such as pt2matsim) and running the simulation. Maven can be downloaded here if it does not already exist on your system.
  • Osmosis needs to be accessible from the command line to convert and filter to convert, filter and merge OSM data sets. Alternatively, you can set the path to the binary using the osmosis_binary option in the confiuration file. Osmosis can be downloaded here.
  • git is used to clone the repositories containing the simulation code. In case you clone the pipeline repository previously, you should be all set.

Then, open your config.yml and uncomment the matsim.output stage in the run section. If you call python3 -m synpp again, the pipeline will know already which stages have been running before, so it will only run additional stages that are needed to set up and test the simulation.

After running, you should find the MATSim scenario files in the output folder:

  • ile_de_france_population.xml.gz containing the agents and their daily plans.
  • ile_de_france_facilities.xml.gz containing all businesses, services, etc.
  • ile_de_france_network.xml.gz containing the road and transit network
  • ile_de_france_households.xml.gz containing additional household information
  • ile_de_france_transit_schedule.xml.gz and ile_de_france_transit_vehicles.xml.gz containing public transport data
  • ile_de_france_config.xml containing the MATSim configuration values
  • ile_de_france-1.0.6.jar containing a fully packaged version of the simulation code including MATSim and all other dependencies

If you want to run the simulation again (in the pipeline it is only run for two iterations to test that everything works), you can now call the following:

java -Xmx14G -cp ile_de_france-1.0.6.jar org.eqasim.ile_de_france.RunSimulation --config-path ile_de_france_config.xml

This will create a simulation_output folder (as defined in the ile_de_france_config.xml) where all simulation is written.

As of version 1.0.6 of the Île-de-France pipeline, simulations of a 5% population sample use calibrated values for the mode choice model. This means after running for 60 or more iterations, the correct mode shares and network speeds are achieved, compared to the EGT reference data.

For more flexibility and advanced simulations, have a look at the MATSim simulation code provided at https://github.com/eqasim-org/eqasim-java. The generated ile-de-france-*.jar from this pipeline is an automatically compiled version of this code.

Using MATSim's emissions contrib

You can calculate air pollution emissions using matsim by using some additional data.

You must download the crit'air data from this site : https://www.statistiques.developpement-durable.gouv.fr/donnees-sur-le-parc-automobile-francais-au-1er-janvier-2021

You should download both files :

  • Données régionales des voitures particulières - 2011 à 2021 (zip, 1.79 Mo)
  • Données communales des voitures particulières - 2011 à 2021 (zip, 130.33 Mo)

Inside the zip you'll find one data file per year, you can extract the files concerning the year you're intereseted in (let's use 2015 for this exemple). Then unzip and place them in a data/vehicles_2015/.

Then, in the config.yml, you must enable the vehicle fleet generation :

# ...

config:
  generate_vehicles_file: True
  generate_vehicles_method: fleet_sample
  vehicles_data_year: 2015

# ...

You should end up, at the end of the matsim.output stage, with a vechicles.xml file.

After you run the full simulation, you'll be able to use some classes defined in eqasim-java to analyse and compute emissions based on the MATSim outputs.

for exemple :

java -cp ile_de_france-1.0.6.jar org.eqasim.ile_de_france.emissions.RunComputeEmissionsEvents --config-path config.xml --hbefa-cold-avg ./EFA_ColdStart_Vehcat_2015_Cold_Average.csv --hbefa-hot-avg ./EFA_HOT_Vehcat_2015_Hot_Average.csv --hbefa-cold-detailed ./EFA_ColdStart_Subsegm_2015_Cold_Detailed.csv --hbefa-hot-detailed ./EFA_HOT_Subsegm_2015_Hot_Detailed.csv
java -cp ile_de_france-1.0.6.jar org.eqasim.ile_de_france.emissions.RunExportEmissionsNetwork --config-path config.xml --time-bin-size 3600
java -cp ile_de_france-1.0.6.jar org.eqasim.ile_de_france.emissions.RunComputeEmissionsGrid --config-path config.xml --domain-shp-path idf_2154.shp

Please note that you need a copy of the HBEFA database in order to run those.

For further information you can look at eqasim-java and matsim-libs/contribs/emissions