Practice Relationship Between Speed And Density (33.2.1) - Traffic Stream Models

Practice: Relationship between Speed and Density

Lesson 33.2.1Traffic Stream Models

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9 questions

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6 sample questions

Question 1.
Define free flow speed in your own words.
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Think about the condition of traffic where vehicles can move freely.
Question 2.
What is jam density?
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Consider the maximum amount of cars that can fit without movement.
3Question 3.
What does Greenshield's model describe?
- The relationship between speed and flow
- The relationship between speed and density
- The relationship between flow and density
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Think about what Greenshield emphasizes.
4Question 4.
True or False: As density increases, speed increases.
- True
- False
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Visualize traffic flow with increasing cars.
Question 5.
For a road with a free flow speed of 80 km/h and jam density of 250 vehicles/km, calculate the maximum possible flow. Then, find the traffic flow when the density is 100 vehicles/km.
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Use Greenshield's equations for your calculations.
Question 6.
Suppose you notice that the speed approaches 60 km/h as the density reduces to 40 vehicles/km on a certain road. Assuming linearity, calculate the free flow speed and jam density.
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Use the inverse relationships to backtrack your values.

5 more questions in this section. Enroll free to practise them all.