41.5.1 - Effective green time
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Practice Questions
Test your understanding with targeted questions
What is effective green time?
💡 Hint: Consider how green, yellow, and lost times play a role.
Define lost time in the context of traffic signals.
💡 Hint: Think about delays when the light changes.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is effective green time?
💡 Hint: Focus on how lost time influences total movement capacity.
True or False: Lost time is only the time for the yellow light.
💡 Hint: Consider what happens when a signal changes.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A traffic signal allows for 35 seconds of green, 6 seconds of yellow, with 4 seconds of lost time. What is the effective green time, and how many vehicles can pass through if the saturation flow rate is 1000 vehicles/hour?
💡 Hint: Use the formula for each part of the calculation.
For a cycle length of 120 seconds and an effective green time of 45 seconds, with the lost times totaling 6 seconds, what is the saturation flow rate if the lane capacity is found to be 900 vehicles/hour?
💡 Hint: Rearranging the capacity equation helps to find saturation flow.
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