<edges>
   <edge id="0" fromnode="0" tonode="1" nolanes="2" speed="36"/>
   <edge id="1" fromnode="1" tonode="2" nolanes="2" speed="36"/>
   <edge id="2" fromnode="2" tonode="3" nolanes="2" speed="36"/>
   <edge id="3" fromnode="3" tonode="0" nolanes="2" speed="36"/>
</edges>
