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With the growing popularity of private cars, city traffic has become more complex, but the road sign is so unitary that can’t change symbol as the traffic changing. Therefore, when in the peak or other bad weather condition, the speed limit and other indicators can’t show drivers correct information, it will affect traffic. And when the traffic is smooth, not allowing smooth passage of vehicles, it is a waste of resources. “Traffic new sign” is a new sign system which can capture traffic information to show the indicative of different symbol will change as the road condition changing, such as the speed limit, and so on.