1. Final Exam Tuesday, December 9 2:30 – 4:20 pm 121 Raitt Hall Open book
Open note

2. Exam Questions Group evaluation
Short answer (2 points, 20 points total)
Short calculations (5 points, 20 points total)
Calculations (20-30 points, 160 points total)

3. Course Material Covered
Vehicle Dynamics
Geometric Design
Pavement Design
Traffic Flow Theory
Queueing Theory
Level of Service
Signalized Intersections
Transportation Planning

4. Suggestions for Preparation
Review each lecture and identify the main points and formulas. Write these on summary notes.
For each lecture, write an question. Do this in a group, and share questions.
Solve these questions from scratch, do not just review solutions.
Review homework and in class examples. Do the problem yourself.
Make a list of the tables in the text, their title, and the page number. Include a note of what it is used for.

5. Vehicle Dynamics
Calculate resistive forces and relate to vehicle speed/acceleration
Calculate engine generated tractive effort and maximum tractive effort
Calculate engine speed
Calculate braking force
Calculate stopping distance

6. Geometric Design Stationing Vertical alignment Horizontal alignment
What is basic form?
What are governing constraints?
Standard assumptions (driver height)
Horizontal alignment
Standard assumptions
Definition of Ms, Rv, R
Go through the variety of equations and identify use for each.
Meaning and applications for K

7. Geometric Design Check a design speed allows for constraints to be met
Provide one or two aspects of a design
Short question: a geometric relationship

8. Pavement Design Define pavement, purpose
Describe pavement types and qualities
Define ESAL
Calculate ESALs
Account for future growth
Design pavement

9. Traffic Flow Theory What are functional forms and relationships?
Use equations to solve for missing variable
Calculate SMS, TMS
Convert from spacing to headway
Identify congested or uncongested flow.

10. Queueing Theory
Understand arrival, departure, service framework and relationships
Convert between rates and times
What does a poisson arrival mean, and imply for inter-arrival times?
What is queue discipline?
Use time versus cumulative number of items diagram

11. Poisson Distribution Good for modeling random events
Count distribution
Uses discrete values
Different than a continuous distribution
P(n) =
probability of exactly n vehicles arriving over time t n
number of vehicles arriving over time t λ
average arrival rate t
duration of time over which vehicles are counted

12. More queueing theory
How to determine average queue length, wait time, number in system for M/D/1, M/M/1, and M/M/N queueing system.
What is the source of delay if average arrivals are less than average departures?
How to determine total delay for D/D/1 system?

13. Level of Service Calculate level of service
Freeway, multi-lane highway
Know how to find and use tables in text
Identify flow to achieve certain LOS

14. ITS
How to calculate speed from loop detector data
Occupancy
On time

15. Signalized Intersections
Know definitions/framework so that you can interpret questions.
What are critical lane groups and why are these important?
Be able to use a queueing diagram to analyze signal cycles.
Beginning and ending queues
What assumptions is this relevant for?
Be able to use equations to analyze signal cycles.

16. D/D/1 Signal Analysis – Numerical
Time to queue dissipation after the start of effective green
Proportion of the cycle with a queue
Proportion of vehicles stopped

17. Signalized Intersections
Calculate signal LOS
Uniform delay
Incremental delay
Initial queue delay
Calculate minimum cycle length
Calculate optimal cycle length
Estimate green time
Check pedestrian crossing time

18. Transportation Planning
What is the purpose of transportation planning?
What are the four modeling steps to the transportation planning process?
What question do each of these steps try to answer?

19. Trip Generation What does the Poisson assumption mean in this case?
How to estimate the number of trips
How to estimate the probability of some number of trips
What is the form of the distribution of inter-trip times?

20. Example Graph

21. Mode Choice What question does a mode choice model answer?
What do the parameters mean?
What form of model did we consider?
How to use the model to estimate mode
Calculate probability of mode choice
Estimate mode choice for a population

22. A Mode Choice Model Logit Model Final form Specifiable part
Unspecifiable part
s = all available alternatives
m = alternative being considered
n = traveler characteristic
k = traveler
Betas are estimated using maximum likelihood
Look at HW 9 to interpret values

23. Route Choice What is a HPF? What relationship does the HPF capture?
What are the limitations of the HPF?
What is UE solution and how to calculate
What is SO solution and how to calculate
How do the UE and SO solution compare?

24. Other quantitative skills
How to find optimal solution
How to solve quadratic equation
How to integrate/differentiate