Concept explainers
The expected reductions inthe number of crashes during the first three years after implementation of the countermeasures.
Answer to Problem 23P
The expected reductions in number of crashes during the first three years after implementation of the countermeasures are
Explanation of Solution
Given:
The number of countermeasures is
The countermeasure factors
The number of crashes per year at the identified intersection during the past three years are
The average annual daily traffic
The average annual daily traffic
The estimated traffic growth rate per annum after implementation is
Formula used:
The crash reduction factor is given by,
Here,
The average number of crashes per year is given by,
The
The crashes prevented first year is given by,
Here,
The crashes prevented second year is given by,
The crashes prevented third year is given by,
Calculation:
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Conclusion:
Therefore, theexpected reductions in number of crashes during the first three years after implementation of the countermeasures are
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Chapter 5 Solutions
Traffic and Highway Engineering
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- Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning