MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305581159
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Question
Chapter 4, Problem 8P
To determine
The plot of expected noncompliance percentages versus the associated speed limit on a graph and recommend the speed for the road with reasons.
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To determine the ADT on the road, the data was collected as shown below on a Tuesday during the following. Consider If the traffic is expected to be 180% from the current traffic up to May 2030, Table 1: Traffic volume at specific time 7:00–8:00 a.m. 8:00 –9:00 a.m 9:00–10:00a.m 10:00–11:00 .m 11:00 –12 noon 150 120 130 50 20
The city received a complaint of afternoon
traffic speeding in a residential area. The
city suspected this was related to students
leaving a nearby school. The first action
taken by the city was to quantify the facts
by conducting a spot speed study. The city
decided to use the stopwatch method
because of their limited resources. The
Speed
(mph)
21.4
22.2
23
24
Frequency of
Vehicles
3.
25
26.1
27.2
28.9
30
31.5
33.3
35.2
37.5
9.
11
13
posted speed limit is 30 mph. The study
was conducted on a Wednesday and started
at 3:00 p.m. The time was selected to
correspond to the period when most
students leave the school. The study
continued until a sample size of 100
9
10
10
9.
40
42.8
vehicles was measured.
Spot speed study has been carried out on a highway and collected data is shown in the
table below.
Speed range
(kmph)
No. of vehicles
observed
0-10
10
10-20
13
20-30
15
30-40
12
40-50
16
Determine the design speed for checking the geometric design of the highway.
Chapter 4 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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