A distracted driver is travelling at 65mph on a roadway with an upgrade of 4% before he finally notices a wreck up ahead that has a stopped the flow of traffic. The driver begins braking at a distance of 270 feet before the site of the wreck the last 150 feet of roadway before the wreck is dry and poor condition, while the 120 feet of roadway before that is dry and in good condition. The vehicle has braking efficiency of 85%.Three vehicles ahead of the driver have been stopped by the wreck, each vehicle being 20 feet long and spaced at 10 feet. The first vehicle is also stopped at 10 feet before the site of the wreck. Will the driver be able to stop in time before hitting the nearest vehicle in front of him? (Assume theoretical stopping distance, ignore air resistance and let frl=0.015)

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

A distracted driver is travelling at 65mph on a roadway with an upgrade of 4% before he finally notices a wreck up ahead that has a stopped the flow of traffic. The driver
begins braking at a distance of 270 feet before the site of the wreck the last 150 feet of roadway before the wreck is dry and poor condition, while the 120 feet of roadway before that is dry and in good condition. The vehicle has braking efficiency of 85%.Three vehicles ahead of the driver have been stopped by the wreck, each vehicle being 20 feet long and spaced at 10 feet. The first vehicle is also stopped at 10 feet before the site of the wreck. Will the driver be able to stop in time before hitting the nearest vehicle in front of him? (Assume theoretical stopping distance, ignore air resistance and let frl=0.015)

Expert Solution
Step 1

Given,

Initial speed, Vi = 65 mph or 95.33 ft/s

Grade, G = 4% or 0.04

Rolling resistance factor, frl = 0.015

Braking efficiency, η = 85%

trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Intersection 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
  • SEE MORE 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