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Traffic heat map of Sullivan County, Tennessee: 560 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Stone Drive and I 81

Sullivan County, Tennessee Traffic Counts

Its busiest road, Stone Drive, carries 34,745 vehicles a day, 5.6 times the average road. This page breaks down traffic in Sullivan County, Tennessee across 560 miles of monitored roads split into 10,286 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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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
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

9.3%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

36.1 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

13.7%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

50.8 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$61,549

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 icon

Highway Traffic in Sullivan County, Tennessee

Trafficvehicles per day12,940
Trucks11.8%
Average travel time33.4 min
Congestion ratio20.1%
Drivers’ average age50.8 yrs
Drivers’ average income$62,459

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 icon

Non-highway Traffic in Sullivan County, Tennessee

Trafficvehicles per day4,604
Trucks4.6%
Average travel time36.7 min
Congestion ratio12.2%
Drivers’ average age50.9 yrs
Drivers’ average income$60,469

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 82% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 33% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +4% versus the annual average.
Lowest month:
December is the quietest month, with volumes -9% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Sullivan County, Tennessee, the peak hour concentrates about 8% of the day's traffic, and traffic stays steady through the year (+4% in high season).

Sullivan County vs. Tennessee Traffic Comparison

The highway truck share sets Sullivan County apart: 25% below the Tennessee average. Its truck share is also 18% below.

MetricSullivan CountyTennessee averageDifference
Traffic6,1737,251-14.9%
Truck % (Total Traffic)9.3%11.3%-18.3%
Truck % (Highway)11.8%15.6%-24.7%
Avg. Travel Time36.1 min32.1 min+12.4%

How Sullivan County compares

Sullivan County moves more traffic than any nearby county or city

Against the 4 nearest areas, Sullivan County moves 3.1 times the total daily travel; it has the third busiest roads of the five. It is bigger rather than busier: the extra travel comes from carrying more road, not from heavier roads.

Sullivan County and the 4 nearest county-level areas by centroid distance, with the Tennessee average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sullivan County6,1739.3%3,795,25236.1 min13.7%
Washington County, Tennessee6,2257.2%2,853,79232.0 min15.0%
Carter County, Tennessee5,8375.8%1,022,62529.6 min15.8%
Bristol City, Virginia9,9259.8%566,82032.8 min24.6%
Scott County, Virginia2,2028.8%500,19531.8 min7.0%
Tennessee average7,25111.3%N/A32.1 min16.1%

Sullivan County ranked within Tennessee

Highway travel volume places Sullivan County #8 of 86 in Tennessee - the top quarter of the state.

Sullivan County ranked among 95 county-level areas in Tennessee (1 = highest); measures without data in every county rank a smaller field, down to 86.
MeasureSullivan CountyTennessee rank
Traffic volume (AADT)6,173#21 of 95
Highway vehicle-miles per day2,461,592#8 of 86
Truck share on highways11.8%#55 of 86
Highway trucks per day1,522#44 of 86
Average travel time36.1 min#14 of 95
Average driver income$61,549#45 of 95
Average driver age50.8 yrs#10 of 95

Busiest roads in Sullivan County, Tennessee

On their busiest stretches, the three busiest roads in Sullivan County carry 33,160 vehicles a day on average, 5.4 times the typical road in the county (6,173).

Stone Drive is the busiest road, at 34,745 vehicles a day, 1,992 of them trucks (5.7%). I 81 carries the most trucks, 7,403 a day (22.1% of its traffic), although it ranks #2 for all traffic.

Freight stands out on I 81: trucks are 22.1% of the traffic there, against 9.3% county-wide.

Trips using Center Street are long: a median of 65.2 minutes against 36.1 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Stone DriveTrunk road · 34,745vehicles1,992trucks · 5.7%
Road class
Trunk road
Congestion ratio
31.6%
Median trip time
29.8 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$58,180

Stone Drive is one of the more congested roads here: trips take 32% longer than at free-flow speed, against 14% county-wide.

2I 81Motorway · 33,506vehicles7,403trucks · 22.1%
Road class
Motorway
Congestion ratio
31.3%
Median trip time
46.8 min
Drivers’ median age
51.4 yrs
Drivers’ average income
$67,050

I 81 carries 5.4 times the county average at its busiest, 7,403 of them trucks (22.1%, above the county-wide 9.3%).

3James H. Quillen ParkwayMotorway · 31,229vehicles2,754trucks · 8.8%
Road class
Motorway
Congestion ratio
29.0%
Median trip time
36.0 min
Drivers’ median age
50.3 yrs
Drivers’ average income
$63,509

James H. Quillen Parkway carries 5.1 times the county average on its busiest stretch, where the median trip lasts 36.0 minutes.

4Center StreetPrimary road · 28,821vehicles1,837trucks · 6.4%
Road class
Primary road
Congestion ratio
63.4%
Median trip time
65.2 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$46,467

Delays build on Center Street: its congestion ratio of 63% over free-flow time is well above the county's 14%.

5John B Dennis HighwayTrunk road · 25,199vehicles2,148trucks · 8.5%
Road class
Trunk road
Congestion ratio
29.6%
Median trip time
29.9 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$58,352

On its busiest stretch, John B Dennis Highway carries 4.1 times the county average; trucks are 8.5% of it, below the county-wide 9.3%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 81Motorway · #2 by traffic33,506vehicles7,403trucks · 22.1%
2James H. Quillen ParkwayMotorway · #3 by traffic31,229vehicles2,754trucks · 8.8%
3John B Dennis HighwayTrunk road · #5 by traffic25,199vehicles2,148trucks · 8.5%
4Stone DriveTrunk road · #1 by traffic34,745vehicles1,992trucks · 5.7%
5Center StreetPrimary road · #4 by traffic28,821vehicles1,837trucks · 6.4%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

SullivanDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Sullivan County

The same traffic breakdown for the areas closest to Sullivan County, Tennessee.

Need segment-level traffic data?

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