
Total Traffic Volume & Performance in Sullivan County, Tennessee
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day6,173 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.3% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 36.1 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 13.7% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.8 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $61,549 |
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A typical monitored road in Sullivan County, Tennessee sees 6,173 vehicles per day, while its 560 miles of monitored roads together handle 3,795,252 vehicle-miles traveled per day (≈1.4 billion per year). Trucks are a smaller part of the mix than across Tennessee: 9.3% against 11.3%.
Longer trips than 86% of counties in Tennessee
Sullivan's average daily traffic volume is 15% lower than the state average - 6,173 vehicles per day against 7,251 - a critical factor for logistics and site planning. Across the whole network, that travel is about 2.1% of Tennessee's statewide total. 79% of counties in Tennessee see less traffic than Sullivan's 6,173 vehicles per day.
At 36.1 minutes, the average travel time is 12% higher than the state level. Its average travel time of 36.1 minutes is longer than 86% of counties in Tennessee.
Congestion runs 15% lower than the state level, at a ratio of 13.7%, which means smoother traffic flow - relevant for traffic control and delivery planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Sullivan County, Tennessee
| Traffic | vehicles per day12,940 |
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| Trucks | 11.8% |
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| Average travel time | 33.4 min |
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| Congestion ratio | 20.1% |
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| Drivers’ average age | 50.8 yrs |
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| Drivers’ average income | $62,459 |
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Highways carry more than half of all travel in Sullivan County, Tennessee (65% of vehicle-miles). The average highway carries 12,940 vehicles per day, 181% more than the average non-highway road in the same area, which carries 4,604 vehicles per day.
Highways make up 39% of the monitored road miles (221 miles, 1,936 segments), so they carry more than their share: 2,461,592 vehicle-miles traveled per day (≈898 million per year).
By highway travel volume, Sullivan outranks 92% of counties in Tennessee.
Passenger-oriented highways
At 11.8%, highway truck share is 25% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
64% of counties in Tennessee see a higher highway truck share than Sullivan's 11.8%. By raw truck volume, Sullivan carries fewer highway trucks than 51% of counties in Tennessee.

Non-highway Traffic in Sullivan County, Tennessee
| Traffic | vehicles per day4,604 |
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| Trucks | 4.6% |
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| Average travel time | 36.7 min |
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| Congestion ratio | 12.2% |
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| Drivers’ average age | 50.9 yrs |
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| Drivers’ average income | $60,469 |
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Local roads carry a significant share of travel in Sullivan County, Tennessee: 35% of all vehicle-miles. The average non-highway road carries 4,604 vehicles per day.
Local roads make up 61% of the monitored road miles (339 miles in 8,350 segments) but carry less than their share of travel: 1,333,660 vehicle-miles traveled per day (≈487 million per year). Trucks make up 4.6% of non-highway traffic, about 1 in 22 vehicles.
Older drivers than 90% of counties in Tennessee
Non-highway roads carry a truck concentration that's 61% lower than the highway network.
At 21% lower than the state level, the non-highway congestion ratio of 12.2% signals easier movement on local roads.
53% of counties in Tennessee see lower average driver income among trip origins than Sullivan. 90% of counties in Tennessee have a younger driver population than Sullivan.