Haley Orr
28 October 2009
CE 223
Jia
Homework Assignment #2
Chapter 9 #3
Chapter 12 #1, 5, 6, 11, 12
Chapter 9 #3
Link
Interchange
1-112
113-2
117-
111
111-
110
110-109
109-
108
108-
107
116-
102
102-
103
103-104
104-105
103-114
1-2
1,000
1,000
1,000
1-3
5,000
5,000
5,000
1-4
3,000
3,000
2-1
4,000
4,000
4,000
2-3
3,000
3,000
2-4
4,000
4,000
4,000
3-1
5,000
5,000
5,000
3-2
6,000
6,000
3-4
1,000
1,000
1,000
4-1
2,000
2,000
4-2
1,000
1,000
1,000
4-3
3,000
3,000
3,000
Total
20,000
19,00
0
20,00
0
4,000
23,00
0
14,000
Chapter 12 #1
Given: Δ = 23°42’ right = 23.7°
D = 1°45’ = 1.75°
PI = 27+85.50
Determine:
Tangent Distance
Curve Length
Station of PT
Solution:
sin ½D=50/R
R=50/(sin ½D)
= 50/(sin ½(1.75°))
= 3274 ft
Tangent Distance
T
= R tan ½Δ
= 3274 tan ½ (23.7°)
=
686.9 ft