21. Traffic Signal Design-II
The chapter discusses traffic signal design, focusing on green splitting, pedestrian crossing requirements, and performance measures of signalized intersections. Effective green time allocation and the evaluation of signal performance using various delay metrics are key aspects covered. The chapter also emphasizes the importance of accommodating pedestrian needs through careful phase design.
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What we have learnt
- Green splitting is determined by the critical lane volumes and effective green time.
- Pedestrian crossing times are calculated based on walking speed and lost time.
- Performance measures such as delay, queuing, and stops are crucial for evaluating signal effectiveness.
Key Concepts
- -- Green Splitting
- The allocation of effective green time among different phases of a traffic signal based on critical lane volumes.
- -- Amber Time
- The duration of the yellow signal light which signals drivers to prepare to stop.
- -- Pedestrian Green Time
- The calculated time allocated for pedestrians to safely cross an intersection.
- -- Delay
- The total time lost by vehicles while traversing an intersection, commonly used as a performance measure.
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