1. What is a queue?
2. Give examples of queueing in real life.
3. What important variables affect queue length.
4. How do you compute total delay from a Newell Curve? What is vehicle delay? How many vehicles are there in the system at a given time.
5. What are some difficulties with calculating queueing times?
6. Define over and under-saturated?
7. Characterize a queue.
8. Define arrival and service rates.
9. If arrival rates > departure rates, what does that imply.
10. Name three types of statistical distributions that describe the behavior of queues and explain them.
11. Can queueing in succession of a length of road mediate arrival demand which reduces delay?
12. Define congestion.
13. Explain the bus bunching idea in relation to queue.
14. How can you determine if a channel is saturated?
15. What is a loop detector?
1. How do loop detectors communicate with stop lights?
2. How do large vehicles affect queue detectors?
16. When does departure rate depend upon arrival rate?
17. What are examples of service methods?
18. What is the effect of controls systems in series?
19. What is the difference between over and undersaturated queues? Give an example of an oversaturated queue.
20. What is the difference between uncapacitated and capacitated queues?
21. What does the variable ρ mean? What is meant when λ > μ, λ < μ
22. Why is there random congestion if the hourly flow is less than hourly capacity (ρ < 1)?
23. How can constraints be included in predicting how many vehicles are expected in a queue? (i.e. capacity of queue)
24. What happens if the average number of cars exceeds ramp capacity?
25. Do equations change for uncapacitated to capacitated queues?
26. How do you calculate the expected number of units in the system?
27. Explain why E(n) ≠ E(m) in words. Why is the average number of units in the system not the same as the mean queue length?
28. Is the expected number of units in the system an average number of units?
29. When μ and λ are random, what kind of queue is it?
30. What does Poisson refer to?
31. What happens to travel time as arrivals approach capacity?
32. Are most systems under or oversaturated in general?
33. What is the average service time?
34. Graph average travel time vs. rho. How does this relate to the volume delay function in Route Choice.
35. How accurate are these formulas for probability of waiting time and queue length?