Creating a Critical Creating a Critical Crash Rate Report Using Crash Rate Report Using Existing Tools and Existing Tools and Available Information Available Information Heath Hoftiezer, P.E., P.T.O.E Heath Hoftiezer, P.E., P.T.O.E Civil Engineer/ P.E. (Traffic) Civil Engineer/ P.E. (Traffic) City of Sioux Falls City of Sioux Falls 2/19/08 2/19/08
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Creating a Critical Crash Rate Report Using Existing Tools and Available Information
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Creating a Critical Crash Rate Creating a Critical Crash Rate Report Using Existing Tools and Report Using Existing Tools and
Rate per Million Entering Vehicles =Rate per Million Entering Vehicles =(number of crashes) * (1 million)(number of crashes) * (1 million)
(number of years) * (ADT) * (365)(number of years) * (ADT) * (365)
Segment RatesSegment Rates
Rate per Million Vehicle Miles =Rate per Million Vehicle Miles =(number of crashes) * (1 million)(number of crashes) * (1 million)
(segment length) * (number of years) * (ADT) * (365)(segment length) * (number of years) * (ADT) * (365)
To calculate an average crash rate use the total number of all crashes for the To calculate an average crash rate use the total number of all crashes for the intersections or segments that the average is desired for along with the total intersections or segments that the average is desired for along with the total ADT of all intersections or segments and if applicable the total of all segment ADT of all intersections or segments and if applicable the total of all segment