GATE CE 2018 Set 1 — Question 25
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Transportation Engineering → Traffic Studies & Flow → Speed-Density-Flow
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Question
The speed-density relationship for a road section is shown in the figure.
The shape of the flow-density relationship is
Correct answer
(C) initially linear then parabolic
Solution
The given speed-density () relationship has two parts:
1.Initially constant speed: for low densities. The flow , which is a linear relationship.
2.Linearly decreasing speed: for higher densities. The flow , which is a parabolic relationship.
Therefore, the flow-density relationship is initially linear then parabolic. Hence, the correct option is (C).Continue learning with Success Tracker
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