Homework Help is Here – Start Your Trial Now!
Engineering
Civil Engineering
4. What is AASHTO's recommended deceleration rate (ft/s)?

4. What is AASHTO's recommended deceleration rate (ft/s)?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

only do question 4

You are designing a vertical sag curve joining a -3% grade to a +2% grade. The design speed is 60 mph. For the design of the curve, the stopping sight distance is based on a 0% grade. 1. Is the shape of the vertical curve circular, elliptic, or parabolic? 2. What is the value of A? 3. What is AASHTO’s recommended perception reaction time (s)? 4. What is AASHTO’s recommended deceleration rate (ft/s²)?
Transcribed Image Text:You are designing a vertical sag curve joining a -3% grade to a +2% grade. The design speed is 60 mph. For the design of the curve, the stopping sight distance is based on a 0% grade. 1. Is the shape of the vertical curve circular, elliptic, or parabolic? 2. What is the value of A? 3. What is AASHTO’s recommended perception reaction time (s)? 4. What is AASHTO’s recommended deceleration rate (ft/s²)?
Expert Solution
Step 1: Factors for stopping sight distance

Following factors affect the stopping sight distance

1. Speed of vehicle 

2. break reaction time.

3. Deceleration rate 

 

Break reaction time is assumed as 2.5 secs and deceleration rate is taken as  11.2 ft/s2

 

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Unit conversion
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.
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
SEE MORE TEXTBOOKS