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Chapter 4: Actuated Traffic Controller Timing Processes
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The purpose of this assignment is to help you improve your understanding of the operation of an actuated
traffic controller system by studying eight cases of signal timing settings and preparing a traffic control
process diagram for each case.
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Describe actuated traffic controller timing processes
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Prepare a document that includes completed charts (Figure 87 through Figure 94), your answers to the
Critical Thinking Questions, and a brief summary of what you have learned about the interrelationship
between the detector and timing components of an actuated traffic controller.
1.
What questions do you still have on signal timing processes after completing this activity?
2. Can unused green time (the time after the last vehicle passes through the intersection and the onset of
yellow) be effectively used? Describe some of the issues that you considered in your answer.
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Constructing a Traffic Control Process Diagram