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Solution Manual for Traffic Engineering (5th Edition by Roess, Prassas & McShane) – Complete Problem Solutions

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Exam (elaborations)

Solution Manual for Traffic Engineering (5th Edition by Roess, Prassas & McShane) – Complete Problem Solutions

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69 pages

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Institution Traffic Engineering

Course Traffic Engineering

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Prepare confidently for your transportation engineering exams with this detailed Solution Manual for Traffic Engineering (5th Edition) by Roess, Prassas, and McShane. It offers complete, step-by-step solutions to all textbook problems, covering traffic flow theory, capacity analysis, signal design, and transportation system performance. Perfect for civil and transportation engineering students aiming to master traffic analysis methods and apply engineering principles to real-world roadway design and safety challenges.

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AllChaptersCovered
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SOLUTIONS

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Traffic Engineering, 5 Edition c c

Roess, R.P., Prassas, E.S., and McShane, W.R.
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SolutionstoHomeworkNo. 2 c c c c

Problem 5‐1 c

A volume of 1,200 veh/h is observed at an intersection approach. Find the peak flow rate
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within the hour for the following peak-hour factors: 1.00, 0.90., 0.80, 0.70. Plot and comment
c c c c c c c c c c c c c c c

on the results.
c c c

Thepeakflow rateofflow iscomputed asv =V/PHF. Thetablebelowsummarizesthe results for
c c c c c c c c c c c c c c c c c c

the information given. A plot follows.
c c c c c c

Evenwiththesamehourlyvolume, a
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small difference in PHF leads to an
c c c c c c c

enormous difference in peak flow
c c c c c

rates. Traffic engineers must be
c c c c c

able to deal with this peaking
c c c c c c

characteristic on a regular basis.
c c c c c

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,Problem 5‐2 c

A traffic stream displays average vehicle headways of 2.4s at 55 mph. Compute the
c c c c c c c c c c c c c

density and rate of flow for this traffic stream.
c c c c c c c c c

A headwaycan beconverted toa flowrateasfollows:
c c c c c c c c c c

v=3600 = 3600 =1,500 veh/hr/ln
c c c c c c c

h 2.4

Knowingbothflowrateand speed(given),thedensitymaynowbecomputed as:
c c c c c c c c c c c c c

D = v = 1500 = 27.3 veh/hr/ln
c c c c c c c

S 55

Problem 5‐3 c

Afreewaydetectorrecordsoccupancyof0.26fora15-minuteperiod. Ifthedetectoris
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3.5 ftlong,andthe average vehicle hasalengthof18 ft.whatisthe densityimpliedby this
c c c c c c c c c c c c c c c c c c c

measurement?
c

Densityisobtainedfromoccupancyasfollows:
c c c c c c

Suchahigh valueisindicativeofhighlycongested conditionswithinaqueue.
c c c c c c c c c c c c

, Problem 5‐4 c

The following traffic count data were taken from a permanent detector location on a major
c c c c c c c c c c c c c c

state highway. From this data, determine (a) the AADT, (b) the ADT for each month. (c) the
c c c c c c c c c c c c c c c c c

AAWT,and(d)theAWTforeachmonth. From thisinformation,whatcan be discerned about
c c c c c c c c c c c c c c c c

the character of the facility and the demand it serves?
c c c c c c c c c c

ThetablebelowillustratesthecomputationofmonthlyADTandAWTvalues.
c c c c c c c c c c c

The AADT is computedasthe total annual volumedivided by365 days,or:
c c c c c c c c c c c c c

AADT= 2,365,000 = 6,479 veh/day
c c c c c

365

The AAWT iscomputedasthe totalweekday volumedivided by260 days,or:
c c c c c c c c c c c c c

AAWT= 2,067,000 = 7,950 veh/day c c c c c

260

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Connected book

William R. McShane, Roger P. Roess, Elena S. Prassas Traffic Engineering

Publisher: 1998 ISBN: 9781845647797 Edition: Unknown

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Uploaded on: November 12, 2025
Number of pages: 69
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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