Practice Effective green time - 41.5.1 | 20. Trafic Signal Design - I | Transportation Engineering - Vol 2
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Knowledge

41.5.1 - Effective green time

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is effective green time?

💡 Hint: Consider how green, yellow, and lost times play a role.

Question 2

Easy

Define lost time in the context of traffic signals.

💡 Hint: Think about delays when the light changes.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is effective green time?

  • A. Total green light time
  • B. Total time for vehicles to move
  • C. Green time adjusted for lost times

💡 Hint: Focus on how lost time influences total movement capacity.

Question 2

True or False: Lost time is only the time for the yellow light.

  • True
  • False

💡 Hint: Consider what happens when a signal changes.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

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.

Question 2

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.

Challenge and get performance evaluation