PRINCIPLES OF HIGHWAY ENGINEERING+TRAFF
7th Edition
ISBN: 9781119688372
Author: Mannering
Publisher: WILEY
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Question
Chapter 3, Problem 17P
To determine
The design speed of the curve.
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2. Use method of sections to determine all member forces in the figure below
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The following data show spot speeds collected at a section of highway located in a residential area before and after an increase in speed enforcement activities. (All speeds are in mi/h.)
Before
After
Before After
44
27
34
21
38
36
35
21
36
23
32
37
41
40
26
26
36
40
38
33
28
32
41
23
32
27
31
24
38
31
36
23
33
22
36
26
44
35
29
23
36
27
31
20
33
18
38
22
40
25
31
26
39
31
33
32
38
33
41
35
Using the student's t-test, determine whether there was a statistically significant difference in the average speeds at a significance level of a = 0.05 (the 95-percent confidence level.)
O Yes, there was a statistically significant difference in the average speeds.
○ No, there was not a statistically significant difference in the average speeds.
Also report, for both the before and after cases, the mean speed, standard deviation, 85th-percentile speed, and percentage of traffic exceeding the posted speed limit of 30 mi/h. (Enter all speeds and standard deviations in mi/h. Round your 85th-percentile…
Chapter 3 Solutions
PRINCIPLES OF HIGHWAY ENGINEERING+TRAFF
Ch. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10P
Ch. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Prob. 31PCh. 3 - Prob. 32PCh. 3 - Prob. 33PCh. 3 - Prob. 34PCh. 3 - Prob. 35PCh. 3 - Prob. 36PCh. 3 - Prob. 37PCh. 3 - Prob. 38PCh. 3 - Prob. 39PCh. 3 - Prob. 40PCh. 3 - Prob. 41PCh. 3 - Prob. 42PCh. 3 - Prob. 43PCh. 3 - Prob. 44PCh. 3 - Prob. 45PCh. 3 - Prob. 46PCh. 3 - Prob. 47PCh. 3 - Prob. 48PCh. 3 - Prob. 49PCh. 3 - Prob. 50PCh. 3 - Prob. 51PCh. 3 - Prob. 52PCh. 3 - Prob. 53PCh. 3 - Prob. 54PCh. 3 - Prob. 55PCh. 3 - Prob. 56PCh. 3 - Prob. 57PCh. 3 - Prob. 58PCh. 3 - Prob. 59PCh. 3 - Prob. 60PCh. 3 - Prob. 61PCh. 3 - Prob. 62PCh. 3 - Prob. 63PCh. 3 - Prob. 64PCh. 3 - Prob. 65PCh. 3 - Prob. 66PCh. 3 - Prob. 67P
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