input_trips.trips.xml

<routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/routes_file.xsd">
    <trip id="0" depart="0" from="beg" to="rend">
        <stop busStop="busStop#1" duration="10"/>
    </trip>

    <trip id="1" depart="0" from="end" to="beg"/>

    <trip id="2" depart="0" from="beg" to="rend" via="left"/>

    <trip id="3" depart="0" from="beg" to="rend">
        <stop busStop="busStop#1" duration="10"/>
    </trip>
</routes>