What this tracks
This dataset measures the smoothness of Tennessee roadways using the International Roughness Index (IRI), where lower numbers indicate smoother roads.
Why it matters to you
If you’re planning a commute or delivery route, this data tells you which roads will give you a smoother ride—or which might need extra suspension care. For business owners with vehicle fleets, rough roads (high IRI values) mean higher maintenance costs over time. In Tennessee, checking this before buying property near a highway could reveal whether you’ll deal with constant road noise from uneven pavement.
How to read this data
IRI_AVERAGE — The roughness score (e.g., 55.7); under 60 is “Good,” while higher numbers mean bumpier roads.
ROUGHNESS_RATING — A plain-language rating like “Good” or “Poor” based on the IRI score.
COUNTY_NAME — Where the road segment is located (e.g., “Bledsoe”).
ROUTE_NUMBER — The numbered route (e.g., 30 for State Route 30).
Try it yourself
Look up your frequent routes by county and route number to see which segments are rated “Poor” and might need alternate paths.