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        Grades

        9-12

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        Auditory, Visual

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        TrafficJam - Part 2: Straight to the Source

        The students visit their city's traffic management center, tour the traffic signal control room and meet with Nick Van Gunst, a traffic engineer who shows them that the city’s traffic light system is controlled by computers.  They learn that a stoplight queue, which is a line of waiting cars, is caused when the cars waiting at a red light don’t get a long enough green light to get through the intersection.

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