How to define vehicle maximum speed in Sumo using jtrrouter

Question

I generated vehicles using jtrrouter in Sumo by turning probability. I first define a vehicle flow and turning probability as below:

<routes>
  <flow id="0" from="e1" begin="0" end="1200" number="180"/>
  <flow id="1" from="e3" begin="0" end="1200" number="180"/>
  <flow id="3" from="e5" begin="0" end="1200" number="180"/>
  <flow id="4" from="e7" begin="0" end="1200" number="180"/>
</routes>

<turns>
    <interval begin="0" end="1200">
        <fromEdge id="e3">
            <toEdge id="e6" probability="0.2"/>
            <toEdge id="e8" probability="0.4"/>
            <toEdge id="e2" probability="0.4"/>
        </fromEdge>

        <fromEdge id="e1">
            <toEdge id="e4" probability="0.3"/>
            <toEdge id="e6" probability="0.2"/>
            <toEdge id="e8" probability="0.5"/>
        </fromEdge>

        <fromEdge id="e7">
            <toEdge id="e2" probability="0.28"/>
            <toEdge id="e4" probability="0.55"/>
            <toEdge id="e6" probability="0.17"/>
        </fromEdge>

        <fromEdge id="e5">
            <toEdge id="e8" probability="0.06"/>
            <toEdge id="e2" probability="0.69"/>
            <toEdge id="e4" probability="0.25"/>
        </fromEdge>


    </interval>
</turns>

Then it will generate s sequence of vehicles like this:

<routes>
    <vehicle id="0.0" depart="0.00" departSpeed="10">
        <route edges="e1 e8"/>
    </vehicle>
    <vehicle id="1.0" depart="0.00" departSpeed="10">
        <route edges="e3 e8"/>
    </vehicle>
    <vehicle id="3.0" depart="0.00" departSpeed="10">
        <route edges="e5 e2"/>
    </vehicle>
    .
    .
    .
<routes>

But what should we do if we want to define the max speed for such vehicles using this method? Where do we need to include the speed. Thanks

Answer 1

Max speed is a property of vehicle type definition vType. I suggest you create a file my_vType_definition.add.xml where you create vType with maxSpeed. It will look something like this:

<?xml version="1.0" encoding="UTF-8"?>

<additional xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/additional_file.xsd">
    <vType id="my_vtype"  vClass="passenger" carFollowModel="IDM" maxSpeed="13.9" speedDev="0.1">
    <!-- maxSpeed is in m/s so 13.9 ~= 50 km/h -->
    </vType>
</additional>

Then your flow definitions can include the vehicle type like this:

<routes>
  <flow id="0" type="my_vType" from="e1" begin="0" end="1200" number="180"/>
  <!-- ... -->
</routes>

The file with new vType needs to be added to your config file (sumocfg) as additional file. It might be necessary to add it also to jtrouter with -d <FILE> or --additional-files <FILE> params.

Then jtrrouter should generate vehicles with maximum speed.