public void AddPerson(Person tmp)
    {
        
        //set new priority
        IncrementPriority();
        //set the person priority at the stop
        tmp.SetPriority(priority);
        //put a person on the stop
        busStop.add(tmp);
        //set minimum passangers
        this.SetMinimumPassenger(busStop.size());
        //set maximum passangers
        this.SetMaximumPassenger(busStop.size());
    }