7. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance (ft)?
7. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance (ft)?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Show work and answer question 7 only

Transcribed Image Text:**Designing a Vertical Sag Curve: An Analysis**
You are tasked with designing a vertical sag curve that transitions from a -3% grade to a +2% grade. The design speed for this curve is 60 mph. The stopping sight distance is calculated based on a 0% grade.
1. **Curve Shape**
- Is the shape of the vertical curve circular, elliptic, or parabolic?
2. **Parameter A**
- What is the value of A?
3. **Reaction Time**
- What is AASHTO’s recommended perception reaction time in seconds?
4. **Deceleration Rate**
- What is AASHTO’s recommended deceleration rate in feet per second squared (ft/s²)?
5. **Driver’s Eye Height**
- What is the assumed height of the driver’s eye for passenger cars in feet?
6. **Object Height**
- What is the assumed height of the object in feet?
7. **Brake Reaction Distance**
- Assuming a 0% grade and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance in feet?
8. **Braking Distance**
- Assuming a 0% grade and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the braking distance in feet?
This set of questions will guide the design considerations for a safe and efficient vertical sag curve on roadways.
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images

Knowledge Booster
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 (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON

Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning


Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON

Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning

Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education


Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning