33. Traffic Stream Models

Try these first

1. 1.

   What is the relationship depicted in Greenshield's model?

   Hint

   Think about how speed changes as vehicles become more crowded.

2. 2.

   Define jam density.

   Hint

   Consider the point at which traffic is completely stopped.

3. 3.

   What does Greenshield's model primarily relate?

   • Speed and Time
   • Speed and Density
   • Density and Flow

   Hint

   Consider how density affects speed.

4. 4.

   True or False: Jam density is the point where traffic flow reaches its maximum capacity.

   • True
   • False

   Hint

   Think about the definition of jam density.

5. 5.

   Consider a scenario where the jam density increased to 400 vehicles/km while maintaining a free-flow speed of 80 km/hr. Calculate the maximum flow and discuss its implications for traffic management.

   Hint

   Use the maximum flow formula while considering the implications of increased jam density.

6. 6.

   Propose changes to the Greenshield model that might improve its predictions for urban traffic systems. Justify your recommendations.

   Hint

   Think about how specific urban factors influence traffic behavior.