@Override
 public void handleEvent(LinkLeaveEvent event) {
   if (event.getVehicleId().toString().startsWith("tr")) {
     PTVehicle vehicle = ptVehicles.get(event.getVehicleId());
     if (vehicle.in) {
       vehicle.in = false;
       vehicle.incDistance(network.getLinks().get(event.getLinkId()).getLength());
     }
   } else {
     TravellerChain chain = chains.get(event.getDriverId());
     if (chain == null) {
       chain = new TravellerChain();
       chains.put(event.getDriverId(), chain);
       chain.modes.add("car");
       chain.distances.add(0.0);
     } else {
       if (chain.in) {
         chain.in = false;
         if (chain.modes.size() == chain.distances.size()
             && chain.modes.get(chain.modes.size() - 1).equals("car")) {
           double linkDistance = network.getLinks().get(event.getLinkId()).getLength();
           chain.distances.set(
               chain.distances.size() - 1,
               chain.distances.get(chain.distances.size() - 1) + linkDistance);
         } else if (chain.modes.size() == chain.distances.size())
           throw new RuntimeException("Person is leaving a link, but is not in a car mode");
         else
           throw new RuntimeException("Modes list has not the same size of distances list (car)");
       } else {
         chain.modes.add("car");
         chain.distances.add(0.0);
       }
     }
   }
 }
  @Override
  public void handleEvent(LinkEnterEvent event) {
    try {
      if (ptVehicles.keySet().contains(event.getVehicleId())) {
        PTVehicle ptVehicle = ptVehicles.get(event.getVehicleId());
        ptVehicle.in = true;
        ptVehicle.setLinkEnterTime(event.getTime());
      } else {
        chains
            .get(driverIdFromVehicleId.get(event.getVehicleId()))
            .setLinkEnterTime(event.getTime());
      }

    } catch (Exception e) {
      System.err.println(e.getStackTrace());
      System.err.println(event.toString());
    }
  }
  @Override
  public void handleEvent(LinkLeaveEvent event) {
    try {
      if (ptVehicles.keySet().contains(event.getVehicleId())) {
        PTVehicle vehicle = ptVehicles.get(event.getVehicleId());
        if (vehicle.in) vehicle.in = false;
        vehicle.incDistance(network.getLinks().get(event.getLinkId()).getLength());

      } else {
        TravellerChain chain = chains.get(driverIdFromVehicleId.get(event.getVehicleId()));
        if (chain.inCar) {
          Journey journey = chain.getJourneys().getLast();
          journey.incrementCarDistance(network.getLinks().get(event.getLinkId()).getLength());
        }
      }
    } catch (Exception e) {
      System.err.println(e.getStackTrace());
      System.err.println(event.toString());
    }
  }