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Chapter 6: Timing Processes on One Approach
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The purpose of this activity is to give you the opportunity to learn how the detection zone length affects
the operation of a phase.
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Relate the length of the detection zone to the duration of the green indication
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Movie file: A32.wmv
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Prepare a document that includes your answers to the Critical Thinking Questions
As you begin this activity, consider the following questions. You will come back to these questions once
you have completed the activity
.
1. How do you know when the detector is active and when it is inactive?
2. When does the phase terminate for the southbound direction for each of the two cases?
3. Why does the phase terminate for each of the two cases?
4. Do you think that the phase is operating efficiently or not for the two cases? Why or why not?
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Relating the Length of the Detection Zone to the
Duration of the Green Indication