2. A driver traveling down a 4% grade collides with a roadside object. The roadway has a posted speed limit is 60mph. The driver mentioned he strictly followed the speed limit. The accident investigation team indicates: braking skid marks started 300 ft before the struck object. a. If the friction factor was measured as 0.2, estimate the speed of the vehicle when it struck the object. b. Estimate the minimum required friction factor so the 300 ft skid marks can allow the driver to safely stop before he would strike the object.

2. A driver traveling down a 4% grade collides with a roadside object. The roadway has a posted speed limit is 60mph. The driver mentioned he strictly followed the speed limit. The accident investigation team indicates: braking skid marks started 300 ft before the struck object. a. If the friction factor was measured as 0.2, estimate the speed of the vehicle when it struck the object. b. Estimate the minimum required friction factor so the 300 ft skid marks can allow the driver to safely stop before he would strike the object.

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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Concept explainers

Intersection Design

An intersection is a location where two or more roads or railways meet or join. The traffic movement is controlled at the intersection that depends on its design and type. It governs the operation, efficiency, speed, capacity, and safety of the highways, airways, and railways. The movement of the pedestrian causes hazards and delays at the intersection.

Question

part a, assuming decelerat on rate is unknown bu the friction factor=0.2.
2. A driver traveling down a 4% grade collides with a roadside object. The roadway has a posted
speed limit is 60mph. The driver mentioned he strictly followed the speed limit. The accident
investigation team indicates: braking skid marks started 300 ft before the struck object.
a. If the friction factor was measured as 0.2, estimate the speed of the vehicle when it
struck the object.
b. Estimate the minimum required friction factor so the 300 ft skid marks can allow the
driver to safely stop before he would strike the object.

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