A horizontal alignment consists of two tangent lin connected by a horizontal curve, as shown in figures below. PC is located at sta. 10+00.00. The overall length of the horizontal curve is 400 feet and an 8% superelevation needs to be designed for the curve. The superelevation runoff length is chosen to be 240 feet. The normal cross-section is also shown in the figure. Both left and right sections have 2% slopes for drainage. On the circular curve, the left section is on the external side and therefore needs to be raised while the right section is on the internal side and should be lowered. The rotation axis is on the center line of the highway, which is shown as a black dot in the figure.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
3.
A horizontal alignment consists of two tangent lines connected by a
horizontal curve, as shown in figures below. PC is located at sta. 10+00.00. The overall length of
the horizontal curve is 400 feet and an 8% superelevation needs to be designed for the curve.
The superelevation runoff length is chosen to be 240 feet. The normal cross-section is also
shown in the figure. Both left and right sections have 2% slopes for drainage. On the circular
curve, the left section is on the external side and therefore needs to be raised while the right
section is on the internal side and should be lowered. The rotation axis is on the center line of
the highway, which is shown as a black dot in the figure.
+2%
Horizontal Alignment
PC
Sta 10+ 00.00
R
The Normal Crown of the Cross-section
Rotation axis
R
-2%
PT
Calculate the tangent runout length (/)
From which station does the left section start to be raised?
From which station does the right section start to be lowered?
From which station is a full superelevation rate attained?
From which station does the left section change back to the normal crown from the full superelevation?
Transcribed Image Text:3. A horizontal alignment consists of two tangent lines connected by a horizontal curve, as shown in figures below. PC is located at sta. 10+00.00. The overall length of the horizontal curve is 400 feet and an 8% superelevation needs to be designed for the curve. The superelevation runoff length is chosen to be 240 feet. The normal cross-section is also shown in the figure. Both left and right sections have 2% slopes for drainage. On the circular curve, the left section is on the external side and therefore needs to be raised while the right section is on the internal side and should be lowered. The rotation axis is on the center line of the highway, which is shown as a black dot in the figure. +2% Horizontal Alignment PC Sta 10+ 00.00 R The Normal Crown of the Cross-section Rotation axis R -2% PT Calculate the tangent runout length (/) From which station does the left section start to be raised? From which station does the right section start to be lowered? From which station is a full superelevation rate attained? From which station does the left section change back to the normal crown from the full superelevation?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 3 images

Blurred answer
Knowledge Booster
Characteristics affecting Road Design
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Structural Analysis
Structural Analysis
Civil Engineering
ISBN:
9781337630931
Author:
KASSIMALI, Aslam.
Publisher:
Cengage,
Structural Analysis (10th Edition)
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Sustainable Energy
Sustainable Energy
Civil Engineering
ISBN:
9781337551663
Author:
DUNLAP, Richard A.
Publisher:
Cengage,
Traffic and Highway Engineering
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning