nets/single-intersection/single-intersection.rou.xml

<routes>
    <route id="route_ns" edges="n_t t_s"/>
    <route id="route_we" edges="w_t t_e"/>
    <flow id="flow_ns" route="route_ns" begin="0" end="100000" probability="0.2" departSpeed="max" departPos="base" departLane="best"/>
    <flow id="flow_we" route="route_we" begin="0" end="100000" probability="0.5" departSpeed="max" departPos="base" departLane="best"/>
</routes>