31.7. Fundamental diagrams of traffic flow

Try these first

1. 1.

   What happens to the flow when there is zero density?

   Hint

   Think about how vehicles are present on the road.

2. 2.

   Define free-flow speed.

   Hint

   Consider the conditions affecting vehicle travel.

3. 3.

   What happens to flow when vehicle density reaches maximum?

   • Flow increases
   • Flow decreases to zero
   • Flow remains constant

   Hint

   Consider the effect of congestion on flow.

4. 4.

   True or False: Free-flow speed occurs at no density.

   • True
   • False

   Hint

   Think about how vehicles operate without any constraints.

5. 5.

   Given a set traffic flow, determine how an increase in density impacts average speed on the roadways. Discuss a scenario where this change might lead to adverse outcomes.

   Hint

   Think about real-life traffic situations where increased vehicles changed the pace.

6. 6.

   Analyze the implications of maintaining optimal traffic flow on urban planning. How can traffic diagrams inform infrastructure decisions?

   Hint

   Consider how a city might design its roads based on these principles.