20. Trafic Signal Design - I
Traffic signal design involves managing traffic flow at intersections through fixed or vehicle-actuated controls. The design process includes understanding various terms and procedures such as phase design, cycle length determination, and effective green time calculation. Key challenges include minimizing delays and safely handling conflicting movements while maximizing intersection capacity.
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Sections
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What we have learnt
- Traffic signals enable orderly movement and increase intersection capacity.
- Understanding cycle length and phase design is essential for effective traffic signal operation.
- Both change and clearance intervals are critical components in signal timing.
Key Concepts
- -- Cycle
- A complete rotation through all signal indications.
- -- Green Interval
- The duration during which a specific set of movements is authorized to proceed.
- -- Lost Time
- Time during which movements at the intersection cannot be effectively utilized.
- -- Effective Green Time
- The total time available for vehicles to pass through the intersection, adjusted for lost time.
- -- Phase Design
- The process of grouping conflicting movements into separate phases to minimize conflicts.
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