33.2.1 - Relationship between Speed and Density
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Practice Questions
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Define free flow speed in your own words.
💡 Hint: Think about the condition of traffic where vehicles can move freely.
What is jam density?
💡 Hint: Consider the maximum amount of cars that can fit without movement.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does Greenshield's model describe?
💡 Hint: Think about what Greenshield emphasizes.
True or False: As density increases, speed increases.
💡 Hint: Visualize traffic flow with increasing cars.
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Challenge Problems
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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.
💡 Hint: Use Greenshield's equations for your calculations.
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.
💡 Hint: Use the inverse relationships to backtrack your values.
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