Question

A traffic signal has a 90-second cycle length. For the travel direction of interest, the red and green times are 30 seconds and 60 seconds, respectively, the arrival rate is constant at 30 veh/min and the saturation flow (i.e., the queue discharge rate) is 1 veh/sec.Calculate the total delay [veh.s] for the travel direction of interest. What is the maximum queue size [veh]?

Answer #1

A traffic signal operates with a 60 seconds cycle length. On the
Eastbound approach, traffic arrives at a constant rate of 20
vehicles/minute. The saturation flow is 1 vehicle/second. The
effective green time is 30 seconds. Calculate the following:
a. The degree of saturation (v/c ratio)
b. The capacity on the approach
c. The spare capacity (%)
d. The average delay to all vehicles

At the signalized intersection, the vehicles began to arrive
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and effective red time is 3 minutes per cycle. The discharge rate
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1. On one approach of an intersection with fixed time traffic
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An approach to a signalized intersection has a saturation flow
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Vehicles arrive in a single approach for two consecutive cycles
at a signalized intersection. The signal has a 60 second cycle time
which consists of a 30 second green interval and a 30 second red
interval (ignore yellow interval). The arrival rates are assumed to
be constant in both cycles. The arrival rate was 1,080
vehicles/hour in the first cycle and it decreased to 720
vehicles/hour in the second cycle. Assume that all vehicles in the
queue formed on red...

An isolated pretimed signalized intersection has an approach
with a traffic flow rate of 750 veh/h and a saturation flow rate of
3200 veh/h. This approach is allocated 32 seconds of effective
green time. The cycle length is 100 seconds. Determine the average
approach delay (using Eq. 7.27).
A) 34.8 s
B) 30.2 s (incorrect)
C) 35.0 s
D) 4.6 s

Delta airlines case study
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What tools could AA leaders have used to increase their
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Please answer the following Case
analysis questions
1-How is New Balance performing compared to its primary rivals?
How will the acquisition of Reebok by Adidas impact the structure
of the athletic shoe industry? Is this likely to be favorable or
unfavorable for New Balance?
2- What issues does New Balance management need to address?
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