public void updateSchedule() {
   VehicleRemover vehremover = new VehicleRemover(scenario);
   VehicleAdder vehadder = new VehicleAdder(scenario);
   Map<Id<TransitLine>, TransitLine> lines = scenario.getTransitSchedule().getTransitLines();
   Iterator<Id<TransitLine>> lineids = lines.keySet().iterator();
   while (lineids.hasNext()) {
     TransitLine tline = lines.get(lineids.next());
     if (Math.random() <= 0.05) { // With 5% probability
       if (Math.random() <= 0.5) { // With 50% probability
         vehadder.addDeparturesToLine(
             tline, 0.1); // Adds 10 % departures and corresponding vehicles from tline
       } else {
         vehremover.removeDeparturesFromLine(
             tline, 0.1); // Removes  10 % departures and corresponding vehicles from tline
       }
     }
   }
 }
 // Add vehicles to the transitschedule according to the sample size
 public void addVehicles(double sample) {
   VehicleAdder vehadder = new VehicleAdder(scenario);
   vehadder.addVehicles(sample);
 }