PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Question
Chapter 2, Problem 33P
To determine
Theperception/reaction time of the driver before and after drinking assumingpractical stopping distance.
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A test driver’s perception-reaction time is being conducted on a special testing track with wet
pavement and a driving speed of 50 kph. When the driver is sober, a stop can be made just in time to
avoid hitting the object that is visible 40m. ahead. After a few drinks of San Miguel beer, under
exactly the same condition, the driver fails to stop in time and strikes the object at speed of 30 kph. Determine the driver’s perception-reaction time after he was drinking. Assume coefficient of friction
is 0.6
A test of a driver's perception reaction time is being conducted a special testing track with wet pavement and a driving speed of 55 mi/hr. When the driver is sober, a stop can be made just in time to avoid hitting an object that is first visible 520 ft ahead. After a few drinks under exactly the same conditions, the driver fails to stop in time and strikes the object at a speed of 35 mi/hr. Determine the driver's perception/reaction time before and after drinking. (Assume practical stopping distance)
A car is driving at 75 mph down a 4.0 % grade on poor, wet pavement. The car's braking efficiency is 90%. The driver
saw an object which is 480 ft away and applied the brake, and his reaction time was 1.0 second. The car's antilock
braking system (ABS) works. Just after seeing the object, which of the following is closest to the distance (in ft)
traveled before applying the brake?
(Assume theoretical stopping distance ignore air resistance and let yb= 1.04 and fr = 0.015).
153 ft
B) 127 ft
135 ft
Chapter 2 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40P
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