Fundamentals of Transportation/Queueing and Traffic Flow/Additional Problems

Additional Questions

 * 1) Why were ideal models of flow vs. density assumed for so long if data did not support it?
 * 2) How do we estimate density of road (in planning or as an after-evaluation?)
 * 3) Explain why the graph of density vs. speed at a bottleneck is not linear using queueing theory.
 * 4) Define time headway and space headway.
 * 5) Why do we need two different speed measures, define each, which is more appropriate?  How are these measures related?
 * 6) What are the 3 fundamental principles of traffic flow? What are their relationships?
 * 7) What does the slope on the space time diagram tell you?
 * 8) What is the difference between looking at traffic as a particle rather than a flow?
 * 9) Define density.
 * 10) As density increases, what happens to flow?
 * 11) Where are time-space diagrams used?
 * 12) What is space headway on a space-time diagram? What is time headway?
 * 13) What does high density mean?
 * 14)  Draw a realistic speed vs. density graph? Compare it with the traditional model.
 * 15) Describe headway speed?
 * 16) How does a bottleneck affect traffic flow upstream of the point?
 * 17) What might cause a falloff of flow as density rises?
 * 18) Why does density reach a maximum when flow is zero?
 * 19) How do these analysis of mathematical relationships between q,k,v  help in planning, design, and operations of road?

/Additional Problems