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The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of 96 seconds is shown in the figure (not drawn to scale).?
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The queue length (in number of vehicles) versus time (in seconds) plot...
Explanation of Queue Length versus Time Plot for Signalized Intersection


Cycle Length


  • The cycle length of a signalized intersection is the total time taken by all the phases of the signal.

  • Here, the cycle length of the signalized intersection is 96 seconds.



Queue Length


  • The queue length is the number of vehicles waiting in the queue to cross the intersection.

  • The queue length varies with time depending on the arrival rate of vehicles and the green time of the signal phase.



Interpretation of the Plot


  • The plot shows the variation of queue length with time for a signalized intersection.

  • The queue length increases during the green time of the first phase (0-30 seconds) and then decreases during the red time of the second phase (31-60 seconds).

  • The queue length increases again during the green time of the third phase (61-90 seconds) and then decreases during the red time of the fourth phase (91-96 seconds).

  • The maximum queue length observed is 25 vehicles at time 75 seconds.



Implications


  • The high queue length indicates that the intersection is operating at or near capacity.

  • The intersection may require additional lanes, signal timing improvements, or other operational improvements to reduce congestion.

  • The signal timings can be optimized to reduce the queue length and delay for vehicles.

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The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of 96 seconds is shown in the figure (not drawn to scale).?
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