Main Function:
1. Both driver and ticket-seller has one panic button. If press the red button, which means there are thief, robber, etc. on the bus. If press green button, which means there are people who take petrol, tinder, etc on the bus. If they refused to hand over these dangerous things, driver or ticker-seller can send alarm report in a conceal way, so that can protect the driver properly.
2. Can install panic button on the bus for passengers. If passengers find any abnormal or smell something, can press the panic button immediately, then, operator at the management centre can see what happen in the bus,and ask the driver to take effective action.
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