Ohio.gov State Agencies  |  Online Services
Skip Ribbon Commands
Skip to main content
Navigate Up
Sign In
 

Roadway Safety

 

Crash frequency/density, severity and crash rate are used to evaluate safety conditions for potential highway projects.  Because of the importance of identifying safety deficiencies, these criteria ensure safety is a primary consideration in the development and design of ODOT. Analysis is based on the data for the most recent consecutive three year period, with crash factors weighted over the length of the project.

Crash Frequency/Density

The crash frequency is the number of crashes occurring at an intersection, while crash density is the number of crashes per mile occurring along a section of highway.

Range​ ​ Points​
0​ 29 0​
30 59 1​
60​ 89​ 2​
90+​ ​ 3
 

Relative Severity Index

The relative severity index represents the relative cost to society of a specific type of crash (e.g. head on, rear end, angle).

Range​ ​ Points​
0​ 19,999 0​
20,000 24,999 1​
25,000 29,999 2​
30,000 34,999 3​
35,000+ 4
 

Crash Rate

Crash Rate is the rate of crashes per million miles of vehicular travel occurring on a route.

Range​ ​ Points​
0​ 0.99​ 0​
1 1.99 1​
2 2.99 2​
3.00+​ ​ 3