public Vehicles getVehiclesOfHHs() {
this.vehiclesOfHHs = new Vehicles();
for (Household hh : this.households.values()) {
for (Vehicle veh : hh.getVehInHH().getVehicles().values()) {
this.vehiclesOfHHs.addVehicle(veh);
}
}
return this.vehiclesOfHHs;
}
