Determine the minimum length (ft) for a vertical curve with 55mph design speed if the grades to be connected are -1.97% and 1.55%. Use the table provided by AASHTO. Table 3.2 Design Controls for Crest Vertical CurvesBased on Stopping Sight DistanceRate of verticalcurvature, K"Design Stopping sightspeed(mi/h)distance(ft)Calculated Design15803.03201156.172515511.1123020018.5193525029.0294030543.1444536060.1615042583.78455495113.511460570150.615165645192.819370730246.924775820311.631280910383.7384

The length of the vertical curve is given by: L=K×G Where, K = Rate of vertical curvature G = Grade…

Answered: Determine the minimum length (ft) for a…

Determine the minimum length (ft) for a vertical curve with 55mph design speed if the grades to be connected are -1.97% and 1.55%. Use the table provided by AASHTO.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Determine the minimum length (ft) for a vertical curve with 55mph design speed if the grades to be connected are -1.97% and 1.55%. Use the table provided by AASHTO.

Table 3.2 Design Controls for Crest Vertical Curves
Based on Stopping Sight Distance
Rate of vertical
curvature, K"
Design Stopping sight
speed
(mi/h)
distance
(ft)
Calculated Design
15
80
3.0
3
20
115
6.1
7
25
155
11.1
12
30
200
18.5
19
35
250
29.0
29
40
305
43.1
44
45
360
60.1
61
50
425
83.7
84
55
495
113.5
114
60
570
150.6
151
65
645
192.8
193
70
730
246.9
247
75
820
311.6
312
80
910
383.7
384

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