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Evaluating Maximum Green Time Settings at an Intersection: Case Studies and Observations

This experiment explores the impact of maximum green time settings on traffic flow at a specific intersection. Participants will open a movie file to observe and record the operations of two different cases, each utilizing distinct green time durations (40 seconds and 60 seconds). The experiment involves analyzing the pros and cons of these settings, answering critical thinking questions related to vehicle queue behavior and phase termination mechanisms, and discussing overall performance outcomes. Data on green interval durations and delay variations will be collected for a comprehensive analysis.

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Evaluating Maximum Green Time Settings at an Intersection: Case Studies and Observations

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Presentation Transcript

  1. Running the Experiment Step 1. Open the movie file Step 2. Observe the operation of case 1 and record your observations. Step 3. Observe the operation of case 2 and record your observations. Step 4. Identify the pros and cons of the two different maximum green time settings on the westbound approach and on the overall performance of the intersection.

  2. Critical Thinking Questions Are all of the vehicles in the initial queue on the EB approach served before the end of each green interval? What is the mechanism for termination of the phase serving the westbound approach? What are the advantages and disadvantages of the 40 second maximum green time for the operation of case 1? What are the advantages and disadvantages of the 60 second maximum green time for the operation of case 2? Which maximum green time setting would you select and why?

  3. Data CollectedGreen Interval Durations for case 1 and 2

  4. Variation of Green Time with Maximum Green

  5. Variation of Delay with Maximum Green

  6. Question 1 Are all of the vehicles in the initial queue on the EB approach served before the end of each green interval?

  7. Question 1

  8. Question 2 What is the mechanism for termination of the phase serving the westbound approach?

  9. Question 3 What are the advantages and disadvantages of the 40 second maximum green time for the operation of case 1?

  10. Question 4 What are the advantages and disadvantages of the 60 second maximum green time for the operation of case 2?

  11. Question 5 Which maximum green time setting would you select and why?

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