Date: Thu, 14 Dec 1995 15:09:38 MST From: Renee Buchanan [RBUCHAN@ssb1.saff.utah.edu]
University of Utah
CIVIL ENGINEERING #571, TRAFFIC FLOW THEORY By Dr. Peter Martin, Civil Engineering
DEPARTMENT OF CIVIL ENGINEERING THE UNIVERSITY OF UTAH CvEn 571 Traffic Engineering Autumn 1995
It is assumed that each of you have completed CvEn 370 and CvEn 420. These courses dealt with:
CvEn 370 Transportation Engineering - An introduction to planning, design and operation principles and practices of transportation systems.
CvEn 420 Urban Systems - An introduction to urban land use
planning, urban system
models and various quantitative planning techniques.
Transportation studies encompasses a wide variety of disciplines. The Traffic Engineering course has been designed to provide you with an insight into traffic control and management techniques. The syllabus states: Application of traffic control devices and management techniques for improving traffic flow and safety.
The learning should equip you to:
If you have a problem which troubles you enough to want to seek help from your instructor, the best and quickest way to communicate is through electronic mail, so try that first.
Dr. Peter T. Martin
The course will adhere closely to the following text:
Adolf D. May, Traffic Flow Fundamentals, Prentice Hall, 1990
I strongly advise you to have access to your own copy for the duration of the course.
The book should be supplemented with your own notes.
There are several other good texts which may be useful for
Garber NJ & Hoel LA, _Traffic and Highway Engineering_, West
Publishing, St Paul. MN. 91988 Yhisti, C. Jotin, _Transportation Engineering: An Introduction_,
Prentice Hall, Engellwood Cliffs, NJ, 1990. Morlok, E.K., _Introduction to Transportation Engineering and
Planning_, McGraw Hill Inc., New York, 1978. Oglesby CH & Hicks RG, _Highway Engineering_ (4th Edition) John
Wiley & Sons, New York, 1982
Wright PH & Paquette RJ, _Highway Engineering_, (4th Edition)
John Wiley & Sons, New York, 1982 Wright, P.H., and Ashford, N.J., _Transportation Engineering:
Planning and Design,_ (3rd Edition) John Wiley & Sons, New York, 1989.
Your grade will be influenced by how well your reports meet the
Write clearly, and don't be afraid to state the obvious. Use the third person passive in the past tense Write your reports so that a Freshman Civil and Environmental
Engineering student could understand them.
Don't ramble or repeat yourself (waffle) Remember: "Quality
triumphs over Quantity"
Don't make things up.
Be your own editor - check your reports yourselves and don't let
your Instructor be the first to read them.
Staple or bind all sheets together.
Words are tools. Use the correct tool for each job. All reports must be typed
Clearly state the goals and objectives of the report. Describe the background to the subject matter, i.e. put the report into context.
Provide a brief historical review
Numerical work should be tabulated where appropriate, e.g. if more
than one set of similarly obtained or treated figures are being dealt with. Ensure that tables are not spread over two pages - start a table on a fresh page, if necessary, to avoid this.
Number and title all tables, and refer to them by number in the text of your report,
e.g. when discussing your results.
State clearly your units in all numerical work.
State clearly, in the appropriate section, what graphs have been
plotted and/or used.
The Discussion section shows how you interpret your findings. It
is the place where you demonstrate your understanding of the field and how the views and feelings of the local community influence your recommendations.
The Conclusions section addresses the introduction by stating the
outcome of the exercise. This section is provided to answer the reader question: "what does it all amount to?"
State plainly the answers to the objectives, posed in the
The References part enables readers to follow-up your work. All material referred to should be listed giving chapter, author,
date, full title and publisher. Here you show where you located the source of your expected results.
The Appendix is a collection of all the miscellaneous items which should be in the
report, but which would spoil the flow of the main sections.
The grading will be a two stage process. An initial draft will be submitted and criticized. The better the initial draft, the more incisive the suggestions will be, so strive to submit your initial draft in its most mature form. Failure to submit an initial draft will inevitably result in a lower score for the final report. A ceiling score of 75% will be applied to final reports which have not been preceded by initial reports.
Late final reports will not be graded.
Append your annotated interim report to your final report.
Community Project Brief Speed Problems in Millcreek
The good people of East Evergreen Avenue, Millcreek have a traffic problem. A posted speed limit of 25 mph seems to be consistently ignored by drivers making speedy short-cuts.
The Salt Lake County Engineers Department measured speeds along the road using pneumatic tube detectors. Their data is attached.
Analyze the data and write a technical report, which shall be
submitted to the MiIlcreek- Lions
Club. You must address the following general issues:
Is the speed limit being broken?
Has there been a change in speed and volume since the 1986 survey'?
Your analysis should take the form of:
Graphical representation of the data - plotted distributions, cumulative frequency plots
Time Mean Speeds
Space Mean Speeds
Comment on the nature of the speed distributions
Assess the adequacy of the 3 sample sizes assuming a confidence level of 95% and bound on error of +/-I mph
I - Title Page - This should include the assignment number, the title, the class name the due date and your name. 2 . Executive Summary - Succinctly identify the nature of the study, the motivation for the study, the general characteristics of the methodology, and the principle conclusions and recommendations. (3-4 paragraphs) 3 . Background - Describe in more detail the nature of the study, the questions being addressed, the theoretical basis for the analysis, and any other pertinent background information. (About a page) 4. Approach - Describe in moderate detail what you did, with specific reference to the theoretical justification for your work. (About a page) 5 . Results - Present your results in summarized form that is easy to follow, using summary tables and charts where appropriate. Detailed work sheets and voluminous interim results should be banished to an appendix, or omitted altogether, if this helps to improve legibility. Include any recommendations and their justification. (About a page of text, plus any tables and figures) 6. Appendices (if needed).
The first part of this project addresses the technical aspects of the traffic problem. You are required to provide a detailed typed report. You will have to research the topic thoroughly by a library study and by making contact with industrial and comniercial organizations in the field. You should review and reference all published material. You may wish to contact manufacturers for trade literature. In essence, your report will:
review the historical development
describe current techniques
point to the future
The second part of this project will expose you to the effect of introducing your designs to the local community. The product of this exercise will be a report that has been modified by those nontechnical issues so important to traffic engineering.
If you discharge this assignment effectively, you will:
have learned how to gather technical and commercial information from a variety of sources be skilled at using a contemporary 'electronic' library understand how and why there is so much more to traffic engineering than just engineering
There follows a list if topics and issues which are provided to guide you in the compilation of your reports. Although wide ranging, it should not be considered exhaustive.
Speed categories and classifications Accident records
When did the 'problem' emerge?
What attempts have already be made'?
The Community Group
How do community pressure groups work'? What are their resources?
What is their status?
How effective have they been in the past What drives them?
How are they constituted?
Who are the officers?
What are the characteristics of the organization?
How many people?
Where do they live? Where do they work?
The Government Engineers
How does the Engineering Department function? What are their resources? What is their legal status? What is their budget? How are they constituted? Who are the officers? How do they relate to City and State organizations'.'
Data Accuracy and Precision
Accuracy what degree of error is associated with the systems? what are the variables which influence control? Precision how repeatable' are the measurements?