1. Traffic volumes on a four-lane freeway (two lanes in each direction) were counted manually from an overhead location, resulting in the data shown here. The desire was to obtain continuous 15-minute counts for each lane of the freeway for a two-hour period surrounding the morning peak hour.
1. Traffic volumes on a four-lane freeway (two lanes in each direction) were counted manually from an overhead location, resulting in the data shown here. The desire was to obtain continuous 15-minute counts for each lane of the freeway for a two-hour period surrounding the morning peak hour.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problems
1. Traffic volumes on a four-lane freeway (two lanes in
each direction) were counted manually from an
overhead location, resulting in the data shown here.
The desire was to obtain continuous 15-minute counts
for each lane of the freeway for a two-hour period
surrounding the morning peak hour.
11On
400
linc
W
Data for Problem 1
Eastbound
Westbound
Time of Count (PM) Lane 1 Lane 2 Lane 1 Lane 2
4:00-4:12
4:15-4:27
4:30-4:42
4:45-4:57
5:00-5:12
360
310
350
285
380
330
370
300
370
340
5:15-5:27
5:30-5:42
5:45-5:57
345
280
340
260
310
320
From the data shown, determine the following:
(a) Continuous 15-minute volumes for each period
and each lane.
(b) The peak hour, peak hour volume, and peak hour
factor (PHF) for each direction of flow and for the
freeway as a whole.
(c) Directional flow rates during each 15-minute
count period.
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