Traffic and Highway Engineering
Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 3, Problem 21P
To determine

The breaking distance to stop an average passenger car.

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Problem 3. Drivers must slow down from 60 mph to 40 mph to negotiate a severe curve on a rural highway. A warning sign is determined to be visible from 120 ft. away. How far must the sign be located, in advance of the curve, to ensure that vehicles have sufficient distance to decelerate? Use the standard reaction time and deceleration rate recommended by AASHTO for basic braking maneuvers.
The freeway speed for a 40 foot long vehicle that spends 1.5 seconds occupying a 6 foot radius, approximately circular loop is .... ...... 34.7 ft/sec 27ft /sec 22 ft/sec O 30 ft/sec
Problem 23: A motorist traveling at 100 kph on an expressway intends to leave the expressway using an exit ramp with a maximum speed of 50 kph. At what point on the expressway should the motorist steps on her brakes in order to reduce her speed to the maximum allowable on the ramp just before entering the ramp? The section of the expressway has a downgrade of 3%. Acceleration is 3.5 m/sec?.
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Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning