PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Chapter 5, Problem 7P
To determine

The probability of the observer counting exactly 4 vehicles in an interval.

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5.7 An observer has determined that the time headways between successive vehicles on a section of highway are exponentially distributed and that 65% of the headways between vehicles are 9 seconds or greater. If the observer decides to count traffic in 30- second time intervals, estimate the probability of the observer counting exactly four vehicles in an interval.
A major road intersection is traversed by vehicles at an average rate of (62.9) vehicles per hour. Find: a. Find the probability that none passes in 20 seconds. b. What is the expected number passing in three minutes? c. Find the probability that this expected number actually pass through in a given three-minute period.
10.6 It is observed that on an average 240 vehicles pass through a point on the highway in every hour. Using Poisson distribution, compute the probability of 1 vehicle arriving at a 30 sec time interval.
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