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Cycle length optimization

  1. Fill in the input table:

    • Define the intersections, noting that each can have a different cycle length.

    • Set the cycle length interval you’re interested in analyzing.
       

  2. Press the Choose button:

    • Green Traffic Software calculates the optimal cycle length within the specified interval, providing the maximum sum bandwidth, attainability, and efficiency for each cycle length (C) in that range.
       

  3. Select the desired cycle length (C):

    • Once selected, the green and red times in the table adjust proportionally to the chosen cycle length.

    • The Arterial Portrait is generated instantly, visualizing the coordination.
       

  4. Click any dark asterisk:

    • Access all necessary coordination details, including the Time-Space Diagram, offsets, and phase sequences.
       

No traffic volumes, saturation flow rates, or capacities are required.

Input table
3-criteria graph
Arterial Portrait
Time-Space Diagram, Outbound direction is prioritized

Morning peak hour (Out: 37 s, In: 21 s)

Time-Space Diagram, traffic flows are equal

Approximately equal traffic flows

(Out: 29 s, In: 29 s)

Time-Space Diagram, Inbound direction is prioritized

Evening peak hour (Out: 22 s, In: 36 s)

Optimizing the cycle length is critical for balancing efficiency and bandwidth. For instance, in this example:

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  • Reducing the cycle length (C) by just 3 seconds, from 121 s to 118 s, decreases the sum bandwidth by nearly 20% (from 58 s to 47 s).

  • Refer to the 3-criteria graph for a visual representation of this impact.
     

Green Traffic Software makes cycle length optimization simple, intuitive, and highly effective for achieving your traffic coordination goals.

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