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        9-12

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        TrafficJam - Part 4: Take the Numbers

        The students go to their intersection to collect data as they had planned.  They measure the amount of time it takes for each of the four traffic lights to complete an entire cycle and how much of that cycle is spent in the red, the yellow and the green phase.  They count the number of cars approaching the intersection from each direction and how many of them turn left, turn right or go straight in 1 hour.  They note that the traffic pattern is affected by the due the freeway to the east of them.  They also count the number of pedestrians crossing the intersection in each direction.

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