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)? 5. What is the assumed height (ft) of the driver's eye for passenger cars? 6. What is the assumed height (ft) of the object? 7. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance (ft)? 8. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the braking distance (ft)?

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)? 5. What is the assumed height (ft) of the driver's eye for passenger cars? 6. What is the assumed height (ft) of the object? 7. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance (ft)? 8. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the braking distance (ft)?

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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