Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 12, Problem 2P
To determine
The three factors that affect the demand for urban travel.
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Refer to the figure below. Given: L₁ = 4m, L2 = 8 m, l₁ = l2 = 2 m, y = 16 kN/m³, Ysat = 18.5 kN/m³, and ' = 26°. Use the charts presented below the answer fields.
Sand
c' = 0
Anchor
L₁
Water table
Sand
Ysat
c' 0
$'
Sand
c' = 0
1. Determine the theoretical depth of penetration.
(Enter your answer to two significant figures.)
D=
m
2. Determine the anchor force per unit length.
(Enter your answer to two significant figures.)
F=
kN/m
3. Determine the maximum moment in the sheet pile.
(Enter your answer to two significant figures.)
CDL₁
Mmax =
0.5
kN-m/m
0.4-
-24= &'
26°
0.3
-28°
30°
32°
0.2
34°
36°
38°
0.1
0.0
0.1
0.2
0.3
0.4
0.5
1.18
1.16
1.14
1.12
1.10
1.08
1.06
1.04
4₁/(L₁+ L₂2)
L₁
4₁+12
0.3
0.2
= 0.4
For the gravity concrete dam shown in the figure, the following data are available:
- Unit weight of concrete (Yeone) = 2.4 ton/m³
- Horizontal earth quake coefficient (Kh) = 0.1
Neglect( Wave pressure, silt pressure, ice force)
H=0.65, (Ywater) -1 ton/m³
Find :-
a- heel and toe stresses (Pain & Pmas)
b- factor of safety against sliding and overturning (F.S. & F.Sover).
Solve in table on paper
W
8m
6m
8m
94m
0.9
A market segment consists of 500 individuals. A Logit mode choice model (with logit parameter
equal to 1) has been estimated for this market resulting in the following utility function:
U = ẞm 0.40C 0.037
where C is out-of-pocket cost in $ and T is travel time in min. Values of ẞm are:
Bus: 0.00; Rail: 0.50; Car: 1.50.
For a particular origin-destination pair, the cost of a car trip is $2 and the duration 8 minutes,
a rail trip is $1.50 and takes 12 minutes, while a bus takes 20 minutes and costs $1.25.
a.
Predict the number of trips for each mode.
b. Which one of the following policies would lead to the largest increase in bus passengers?
Why?
(i) An increase in the price of gas that increases the cost of a car trip to $3, while all other
parameters remain constant.
(ii) Introducing an express service that decreases the travel time of the rail to 10 min, while
all other parameters remain constant.
(iii) Decrease the cost of the bus to $1, while all other parameters remain constant.
Chapter 12 Solutions
Traffic and Highway Engineering
Ch. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - Given a table with production and attraction data,...
Ch. 12 - Given a table with production and attraction data,...Ch. 12 - Prob. 12PCh. 12 - Prob. 13PCh. 12 - Prob. 14PCh. 12 - Prob. 15PCh. 12 - Prob. 16PCh. 12 - Prob. 17PCh. 12 - Prob. 18PCh. 12 - Prob. 19PCh. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - Prob. 25PCh. 12 - Prob. 26PCh. 12 - Prob. 27PCh. 12 - Prob. 28P
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