(i)
The long- time average number of injury crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us: Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the number of fatal crashes:
Where,
Substituting the values, we have
Conclusion:
Therefore, the long- time average number of injury crashes per year at the site is
(ii)
The long-time average number of fatal crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us:
Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the number of fatal crashes:
Where,
Substituting the values, we have
Conclusion:
Therefore, the number of fatal crashes per year at the site is
(iii)
The long-time average number of property damage only crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us:
Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the long-time average number of property damage only crashes per year at the site
Where,
Substituting the values, we have
Conclusion:
Therefore,the long-time average number of property damage only crashes per year at the site
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Chapter 5 Solutions
Traffic And Highway Engineering
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