Interstate Historical Average Statewide Roughness

 

The data shown here represents the changing ride quality of Interstate routes as measured by the International Roughness Index (IRI). IRI values increase as roughness levels increase. Consequently, lower numbers on this chart represent smoother pavements. 
 

     

 

 

Contact Info
Kentucky Transportation Cabinet
200 Mero Street
Frankfort, KY 40622
Phone: (502)564-4556
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