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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day7,251 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 11.3% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 32.1 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 16.1% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 45.5 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $77,734 |
Our data shows 7,251 vehicles per day on the average road in Tennessee, and 180,022,480 vehicle-miles traveled per day (≈65.7 billion per year) across its 25,967 miles of monitored roads. Trucks are 11.3% of traffic, more than the 9.3% across the US.
The average road in Tennessee carries 7,251 vehicles per day, essentially matching the national average of 6,986. Network-wide, Tennessee accounts for about 2.4% of the national total of vehicle-miles. By volume, Tennessee's 7,251 vehicles per day outpaces 66% of states nationwide.
At 32.1 minutes, the average travel time matches the national level closely. On travel time, Tennessee runs shorter than 82% of states nationwide.
The congestion ratio of 16.1% runs slightly lower than the national level (15% lower) - relevant for traffic control and delivery planning.
| Traffic | vehicles per day13,802 |
|---|---|
| Trucks | 15.6% |
| Average travel time | 37.8 min |
| Congestion ratio | 30.9% |
| Drivers’ average age | 46.9 yrs |
| Drivers’ average income | $74,800 |
A little more than half of the driving in Tennessee happens on highways: 56% of all vehicle-miles. The average highway carries 13,802 vehicles per day, 112% more than the average non-highway road in the same area, which carries 6,517 vehicles per day.
Highways make up 26% of the monitored road miles (6,772 miles, 41,563 segments), so they carry more than their share: 101,605,912 vehicle-miles traveled per day (≈37.1 billion per year).
By highway travel volume, Tennessee outranks 82% of states nationwide.
The concentration of trucks on highways (15.6%) is 19% higher than the national average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
Tennessee's highway truck share (15.6%) is higher than 76% of states nationwide. Tennessee's highway truck count is higher than 82% of states nationwide, at roughly 2,155 trucks per day.
| Traffic | vehicles per day6,517 |
|---|---|
| Trucks | 5.8% |
| Average travel time | 31.5 min |
| Congestion ratio | 15.4% |
| Drivers’ average age | 45.1 yrs |
| Drivers’ average income | $80,993 |
A significant share of driving in Tennessee, 44% of vehicle-miles, happens on local roads. A typical local road sees 6,517 vehicles per day.
Local roads make up 74% of the monitored road miles (19,195 miles in 370,920 segments) but carry less than their share of travel: 78,416,573 vehicle-miles traveled per day (≈28.6 billion per year). About 1 in 17 vehicles on non-highway roads is a truck (5.8%).
Compared to highways, non-highway routes see 63% fewer trucks by share.
At 16% lower than the national level, the non-highway congestion ratio of 15.4% signals easier movement on local roads.
Trip origins here have lower average income than 74% of states nationwide. 68% of states nationwide have an older driver population than Tennessee.
Of the four measures, truck share differs most: Tennessee runs 21% above the United States average. Its highway truck share is also 19% above.
| Metric | Tennessee | United States average | Difference |
|---|---|---|---|
| Traffic | 7,251 | 6,986 | +3.8% |
| Truck % (Total Traffic) | 11.3% | 9.3% | +21.3% |
| Truck % (Highway) | 15.6% | 13.1% | +19.4% |
| Avg. Travel Time | 32.1 min | 33.3 min | -3.7% |
Tennessee tracks the 4 states around it closely - no measure in this table sets it far apart from the states immediately next to it, though it has the second busiest roads of the five.
| State | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Tennessee | 7,251 | 11.3% | 180,022,480 | 32.1 min | 16.1% |
| Kentucky | 4,696 | 12.1% | 118,801,454 | 31.7 min | 14.7% |
| Alabama | 5,932 | 10.6% | 141,682,089 | 31.8 min | 15.5% |
| Georgia | 7,398 | 9.7% | 279,644,557 | 33.6 min | 16.8% |
| Mississippi | 5,319 | 11.1% | 99,147,180 | 30.7 min | 15.2% |
| United States average | 6,986 | 9.3% | N/A | 33.3 min | 18.9% |
Tennessee's three busiest counties account for 28.2% of all the vehicle-miles measured in the state.
| County | Daily vehicle-miles | Average daily traffic | Truck share | Road miles |
|---|---|---|---|---|
| 1. Shelby County | 19,549,134 | 9,079 | 8.5% | 1,843 |
| 2. Davidson County | 19,206,778 | 10,990 | 9.8% | 1,116 |
| 3. Knox County | 12,073,911 | 10,860 | 9.8% | 843 |
Together, those five counties carry just 6.0% of the truck vehicle-miles driven in the state. Truck share says where trucks dominate the mix; it does not say where the freight is.
| County | Truck share | Truck share on highways | Average daily traffic | Daily vehicle-miles |
|---|---|---|---|---|
| 1. Marion County | 23.0% | 27.3% | 4,259 | 1,796,753 |
| 2. Grundy County | 20.8% | 26.0% | 3,572 | 831,297 |
| 3. Haywood County | 20.5% | 25.8% | 2,493 | 1,332,816 |
| 4. Decatur County | 20.4% | 21.8% | 2,686 | 684,664 |
| 5. Smith County | 19.2% | 21.7% | 3,864 | 1,177,177 |
Asking the same question of truck vehicle-miles gives a different answer - Davidson County, Shelby County, Knox County, Hamilton County and Rutherford County, together 31.2% of all truck travel in Tennessee.
On their busiest stretches, the three busiest roads in Tennessee carry 160,350 vehicles a day on average, 22.1 times the typical road in the state (7,251).
I 24 in Davidson County is the busiest road, at 211,830 vehicles a day, 24,082 of them trucks (11.4%). No other road comes close: I 65 in Davidson County, in second place, carries 136,517. It tops the truck ranking too, with the most trucks.
Trucks make up 24.2% of traffic on I 40 in Loudon County and 22.3% on W B Fowler Senior Expressway in Shelby County, against 11.3% across all roads in the state.
I 40 in Loudon County carries longer journeys than most roads here, with a median trip of 51.5 minutes against 32.1 state-wide.
Drivers on I 65 in Davidson County come from neighborhoods with an average household income of $115,384, 48% above the state average of $77,734.
I 24 is one of the more congested roads here: trips take 114% longer than at free-flow speed, against 16% state-wide.
I 65 carries 18.8 times the state average on its busiest stretch, where the median trip lasts 38.8 minutes.
At 18.3 times the state average, Avron B Fogelman Expressway draws drivers from neighborhoods averaging $82,763 in household income.
A main artery: I 40's busiest stretch carries 17.6 times the state average; trucks are 12.5% of it, above the state-wide 11.3%.
I 40 is a trunk route for the state, carrying 15.7 times the state average on its busiest stretch; trucks are 12.6% of it, above the state-wide 11.3%.
Delays build on I 24: its congestion ratio of 92% over free-flow time is well above the state's 16%.
TN 153 carries 13.0 times the state average at its busiest, 8,622 of them trucks (9.1%, below the state-wide 11.3%).
Doctor Martin Luther King Junior Expressway carries 12.8 times the state average on its busiest stretch, where the median trip lasts 35.2 minutes.
At 12.7 times the state average, Four-Forty Parkway draws drivers from neighborhoods averaging $99,776 in household income.
A main artery: Bishop J O Patterson Senior Memorial Parkway's busiest stretch carries 11.9 times the state average; trucks are 14.5% of it, above the state-wide 11.3%.
I 40 is a trunk route for the state, carrying 10.5 times the state average on its busiest stretch; trucks are 24.2% of it, above the state-wide 11.3%.
Drivers on I 40 are on long journeys, a median 51.5 minutes against 32.1 state-wide: a through route more than a local street.
W B Fowler Senior Expressway carries 9.0 times the state average at its busiest, 14,616 of them trucks (22.3%, above the state-wide 11.3%).
The average monitored road in Tennessee carries 7,251 vehicles per day, in line with the national average of 6,986.
Tennessee carries more highway trucks by raw volume than 82% of states nationwide, at roughly 2,155 per day.
Traffic in Tennessee is nearly flat through the year: even the busiest stretch, April–June, runs only +3% versus the annual average. January is the quietest month, averaging 6,716 vehicles per day, 7% below the annual average.
Trucks make up about 11.3% of all traffic in Tennessee, rising to 15.6% on highways, where long-haul freight concentrates.
Drivers on Tennessee roads have a median age of 45 years, and the median household income of the neighborhoods trips originate from averages $77,734, 15% below the national average.
Weekday traffic has two busy windows: AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 3:00 PM to 7:00 PM - about 67% above the daily average.
The average trip in Tennessee takes 32.1 minutes, about the same as the national average, delays at signals and congestion included.
I 24 in Davidson County carries the most, 211,830 vehicles per day on its busiest stretch, followed by I 65 in Davidson County (136,517), Avron B Fogelman Expressway in Shelby County (132,705), I 40 in Knox County (127,468), I 40 in Davidson County (113,797). Figures are AADT, both directions combined.
I 24 in Davidson County, with about 24,082 trucks per day on its busiest stretch, 11.4% of its 211,830 vehicles.
About 211,830 vehicles per day in both directions on its busiest stretch, including 24,082 trucks (11.4%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

Mobile device location data (anonymized and aggregated)

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Historical traffic pattern databases
The same traffic breakdown for the states closest to Tennessee.
Identify traffic patterns street by street and analyze the exact corridors that matter to your project.
Traffic counts, truck share, congestion and driver demographics for each of the 95 counties TrafficZoom measures in Tennessee.