Creating a New Scenario From Scratch#

SUMO Network and Configuration#

For compatibility with the VCE, your SUMO scenario must contain the following:

  • A routes file (.rou.xml) with the following information:

    <vType id="ego-type" color="blue"/>
    <route id="ego-route" edges="-19206342#0 -19206341#6 -19206341#4 -19206341#3 -19206341#1 -323350445#1 -369470720"/>

    A vehicle type definition for ego-type.


    The route that the ego vehicle will (likely) travel. This is mainly necessary for other traffic participants to react appropriately depending on whether the ego vehicle is going to go straight at an intersection or turn right.

    If you look at some of the example scenarios (e.g., scenarios/example-intersection/), you may notice that they have two .rou.xml files, and that one of them is named ego-vehicle-only.rou.xml. Since the SUMO configuration file (.sumo.cfg or .sumocfg) allows us to define multiple route files for one scenario, we can keep the ego vehicle definition separate from other routes that we might regenerate more frequently.

  • A network file (.net.xml) with a specific setting of projParameter in the location element. For the time being, our 3D Environment simply passes this parameter on to a third-party library, which has no understanding of SUMO’s - or ! special definitions of projParameter. If your scenario is generated artificially, you may simply copy a value of projParameter from one of the example scenarios.

  • An additionals file (.poly.xml).

    When you select a .net.xml in the 3D Environment, it will automatically look for a file with the same name that has the .poly.xml file name extension.

    This file should include at least one point of interest (poi) of type EgoVehicleStart to define where the ego vehicle will be spawned.

    In addition the additionals file may include poly elements of type building or poi elements for supported street signs – currently type values starting with StreetSign_ and ending with:

    • yield

    • priority

    • stop

    • no_entry

    • no_left_turn

    • no_right_turn

    • no_straight_on

    • oneway_left

    • oneway_right

    • only_left_turn

    • only_right_turn

    • speed_limit_30

    • speed_limit_50

EVI Configuration#



Optional Triggers File#

The EVI can optionally read a <scenario name>.triggers.yaml file and trigger certain events when the ego vehicle approaches a trigger point and gets closer than a defined distance. Events include the following, corresponding to their respective class in evi/src/evi/


Spawn a new vehicle.


Resume a previously stopped vehicle.


Set the active signals of a given vehicle, such as lights or open doors (which are also defined as signals in SUMO).

A triggers file may look as follows:

    default_vehicle_type: default
    triggers_max_radius: 3
    - ego_xy: [42, 1337, 0]
        - arrival_lane:
          vehicle_id: triggered-car0
          num_vehicles: 1
          vehicle_type: default  # we could leave this out because of line 2