41.2 - Definitions and notations
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Practice Questions
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What is a cycle in traffic signals?
💡 Hint: Think about what happens from red to green.
What denotes cycle length?
💡 Hint: Consider how we measure the duration of the changing lights.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a cycle in traffic signals?
💡 Hint: Consider what happens through a full change of lights.
True or False: The clearance interval is used for clearing the intersection of vehicles before the traffic signal changes.
💡 Hint: Think about how signals ensure safety for all movements.
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Challenge Problems
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Consider an intersection that has a green light of 25 seconds, a yellow light of 5 seconds, and an all-red clearance of 2 seconds. Calculate the cycle length and discuss how lost time factors into this scenario.
💡 Hint: Add all light phases together, and remember to consider the driver's response time.
If a change interval is extended from 3 seconds to 6 seconds, hypothesize how this might impact traffic flow and lost time at an intersection.
💡 Hint: Think about how longer yellow lights might help both safety and delays.
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