<routes>
<vType id="bus" sigma="0" maxSpeed="3"/>
<route id="busroute" repeat="2">
<stop busStop="busStop_a" duration="10"/>
<stop busStop="busStop_c" duration="10"/>
<stop busStop="busStop_-c" duration="10"/>
<stop busStop="busStop_-a" duration="10"/>
</route>
<flow id="bus" type="bus" begin="0" number="2" period="100" route="busroute"/>
<vehicle id="bus_single" type="bus" depart="300" route="busroute"/>
</routes>