Traffic signal qustin using boolean arrays

Consider the traffic signalling below (Fig 1). Create a traffic signal class, consisting of a Boolean array of three values, Red, green and yellow such that, only one can be true and others false (Use circular queue). Generate four such traffic signal objects for the situation below (Fig 2), such that the traffic never comes to halt and there are no accidents. Note: In the moming Juanda Street East is high traffic (200 cars/minute) and same thing repeats in the evening on Juanda west street. Other streets have light

traffic (20 cars/ minute). 2000 cars standing in one street will be considered as

traffic jam.

ublic class TrafficSignal implements Runnable {
    public enum Color {RED, ORANGE, GREEN}

    private Color color;

    private static volatile Color previous = Color.ORANGE;

    public TrafficSignal(Color color) {
        this.color = color;
    }

    public synchronized void display() throws InterruptedException {
        switch (color) {
            case RED:
                while (previous != Color.ORANGE) wait();
                break;

            case ORANGE:
                while (previous != Color.GREEN) wait();
                break;

            case GREEN:
                while (previous != Color.RED) wait();
                break;
        }

        System.out.println(this.color);
        Thread.sleep(1000);
        previous = color;
        notifyAll();
    }

    @Override
    public void run() {
        while (true) {
            try {
                display();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        new Thread(new TrafficSignal(TrafficSignal.Color.GREEN)).start();
        new Thread(new TrafficSignal(TrafficSignal.Color.ORANGE)).start();
        new Thread(new TrafficSignal(TrafficSignal.Color.RED)).start();
    }
}