30.2. Traffic stream parameters

Try these first

1. 1.

   What does flow measure in traffic?

   Hint

   Think about how many cars cross a certain line.

2. 2.

   Define density.

   Hint

   What does it mean when cars are close together?

3. 3.

   What is the primary measurement of flow?

   • Density
   • Vehicles per hour
   • Speed

   Hint

   Consider what units flow is often measured in.

4. 4.

   True or False: Greater density always leads to smoother traffic flow.

   • True
   • False

   Hint

   Think about a crowded road versus an empty one.

5. 5.

   Given that 240 vehicles pass a point in 30 minutes during rush hour, calculate the flow in vehicles per hour. Explain your reasoning.

   Hint

   Remember to convert minutes into hours for your calculation.

6. 6.

   If a highway section has a density of 35 vehicles/km, what is the expected flow if the average speed is 70 km/h? Use the formula: Flow = Density x Speed.

   Hint

   Combine the density with the speed to find the flow.