GATE CE topic:traffic-engineering PYQs & Answers — Page 2

Questions 11–20 of 44. Imported answers require independent review unless marked reviewed.

The figure presents the trajectories of six vehicles within a time-space domain. The number in the parentheses represents unique identification of each vehicle.

Diagram for Civil Engineering question 63

The mean speed (in km/hr) of the vehicles in the entire time-space domain is ______________ (rounded off to the nearest integer).

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A plot of speed-density relationship (linear) of two roads (Road A and Road B) is shown in the figure.

Diagram for Civil Engineering question 46

If the capacity of Road A is C_A and the capacity of Road B is C_B, what is

Your answerChoose one option.

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The figure presents the time-space diagram for when the traffic on a highway is suddenly stopped for a certain time and then released. Which of the following statements are true?

Diagram for Civil Engineering question 50

Your answerSelect all correct options. You can choose more than one.

Speed is higher in Region R than in Region P

Volume is lower in Region Q than in Region P

Volume is higher in Region R than in Region P

Density is higher in Region Q than in Region R

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For a traffic stream,

is the space mean speed,

is the density,

is the flow,

is the free flow speed, and

is the jam density. Assume that the speed decreases linearly with density.

Which of the following relation(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

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Consider the four points P, Q, R, and S shown in the Greenshields fundamental speed-flow diagram. Denote their corresponding traffic densities by

, and

, respectively. The correct order of these densities is

Diagram for Civil Engineering question 44

Your answerChoose one option.

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A single-lane highway has a traffic density of 40 vehicles/km. If the time-mean speed and space-mean speed are 40 kph and 30 kph, respectively, the average headway (in seconds) between the vehicles is

Your answerChoose one option.

3.00

2.25

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A two-phase signalized intersection is designed with a cycle time of 100 s. The amber and red times for each phase are 4 s and 50 s, respectively. If the total lost time per phase due to start-up and clearance is 2 s, the effective green time of each phase is _____s. (in integer)

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At a traffic intersection, cars and buses arrive randomly according to independent Poisson processes at an average rate of 4 vehicles per hour and 2 vehicles per hour, respectively. The probability of observing at least 2 vehicles in 30 minutes is ______. (round off to two decimal places)

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Assuming that traffic on a highway obeys the Greenshields model, the speed of a shockwave between two traffic streams (P) and (Q) as shown in the schematic is ______ kmph. (in integer)

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The vehicle count obtained in every 10 minute interval of a traffic volume survey done in peak one hour is given below.

Time Interval (in minutes)	Vehicle Count
0 – 10	10
10 – 20	11
20 – 30	12
30 – 40	15
40 – 50	13
50 – 60	11

The peak hour factor (PHF) for 10 minute sub-interval is ________. (round off to one decimal place)

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GATE CE topic:traffic-engineering PYQs

Question 63

Question 46

Question 50

Question 28

Question 44

Question 44

Question 62

Question 63

Question 63

Question 64