Show work and answer question 7 only 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 recommendeddeceleration rate, what is the brake reaction distance (ft)?8. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommendeddeceleration rate, what is the braking distance (ft)?

Answered: Image /qna-images/answer/fbf7bf50-f9f5-4314-93d6-e5f2bba48fcd.jpg

Answered: 7. Assuming a 0% grade, and AASHTO's…

7. Assuming a 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the brake reaction distance (ft)?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 19P

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Pricing Concrete Work

The concrete work in a project usually holds a high-end cost in terms of cost and value of the work. It becomes an important step in calculating the cost associated with concrete while preparing the project scale. The cost of making concrete depends on the cost of building materials, mixed materials, labor, and machinery. A concrete contractor builds structures from concrete, usually managing all the steps of the process from assembling ingredients to building a holding structure and preparing the mixture. This person or team oversees the delivery and unloading of goods to ensure that they are done properly. Nowadays, most of the concrete in the United States comes from manufacturers working abroad, usually with branches and plants within the provinces. Contributions can range from pre-mixed concrete to basic ingredients, the consumer company then mixes it. Many American-based concrete companies, however, offer concrete products, such as ballads, bricks, countertop, concrete pipe, and building products, as well as concrete construction and installation materials. This article covers both types of suppliers for this set of building materials.

Question

Show work and answer question 7 only

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)?

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