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Traffic heat map of Harlan County, Kentucky: 210 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 421 and US 119

Harlan County, Kentucky Traffic Counts

How busy are the roads of Harlan County, Kentucky? We measure 210 road miles, divided into 2,706 segments, with multi-sourced, cross-verified mobile and sensor data. Its busiest road, US 421, carries 19,156 vehicles a day, 9.3 times the average road. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Harlan County, Kentucky

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day2,063
Trucks

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

8.2%
Average travel time

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

27.3 min
Congestion ratio

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

6.6%
Drivers’ average age

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

50.0 yrs
Drivers’ average income

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

$43,812

The average monitored road in Harlan County, Kentucky carries 2,063 vehicles per day. Across its 210 miles of monitored roads, that adds up to 417,292 vehicle-miles traveled per day (≈152 million per year). Trucks are a smaller part of the mix than across Kentucky: 8.2% against 12.1%.

Shorter trips than 91% of counties in Kentucky

Harlan sees 56% lower average daily traffic volume than the state average (2,063 vehicles per day against 4,696), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries about 0.4% of Kentucky's statewide total of vehicle-miles. Harlan carries less traffic than 68% of counties in Kentucky.

The average trip takes 27.3 minutes, 14% lower than the state level. Its average travel time of 27.3 minutes is shorter than 91% of counties in Kentucky.

The congestion ratio of 6.6% is 55% lower, pointing to smoother traffic flow than the state level - delays are rare enough to plan travel times almost to the minute.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Harlan County, Kentucky

Trafficvehicles per day4,397
Trucks9.1%
Average travel time28.9 min
Congestion ratio9.6%
Drivers’ average age49.9 yrs
Drivers’ average income$45,710

Highways carry more than half of all travel in Harlan County, Kentucky (63% of vehicle-miles). The average highway carries 4,397 vehicles per day, 223% more than the average non-highway road in the same area, which carries 1,360 vehicles per day.

Highways make up 29% of the monitored road miles (62 miles, 627 segments), so they carry more than their share: 262,770 vehicle-miles traveled per day (≈95.9 million per year).

Lower highway truck share than 92% of counties in Kentucky

Highway truck concentration here runs 42% lower than the state average, at 9.1%. Highways here carry mainly commuter and local trips, with little through freight.

By truck concentration, highways here trail 92% of counties in Kentucky. By raw truck volume, Harlan carries fewer highway trucks than 92% of counties in Kentucky.

non-highway traffic icon

Non-highway Traffic in Harlan County, Kentucky

Trafficvehicles per day1,360
Trucks6.8%
Average travel time26.8 min
Congestion ratio5.7%
Drivers’ average age50.3 yrs
Drivers’ average income$40,769

Local roads carry a significant share of travel in Harlan County, Kentucky: 37% of all vehicle-miles. On the average non-highway road, that comes to 1,360 vehicles per day.

Local roads make up 71% of the monitored road miles (149 miles in 2,079 segments) but carry less than their share of travel: 154,521 vehicle-miles traveled per day (≈56.4 million per year). The truck share on non-highway roads is 6.8%.

Drivers from lower-income areas than 92% of counties in Kentucky

The concentration of trucks on non-highway roads is 26% lower than on highways.

At 59% lower than the state level, the non-highway congestion ratio of 5.7% signals easier movement on local roads.

92% of counties in Kentucky see higher average driver income among trip origins than Harlan. Harlan's median driver age is higher than 86% of counties in Kentucky.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Harlan County, Kentucky, the peak hour concentrates about 7% of the day's traffic.

Harlan County vs. Kentucky Traffic Comparison

Of the four measures, average daily traffic per road differs most: Harlan County runs 56% below the Kentucky average. Its highway truck share is also 42% below.

MetricHarlan CountyKentucky averageDifference
Traffic2,0634,696-56.1%
Truck % (Total Traffic)8.2%12.1%-31.6%
Truck % (Highway)9.1%15.9%-42.5%
Avg. Travel Time27.3 min31.7 min-13.8%

How Harlan County compares

Harlan County against nearby counties

Harlan County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the third busiest roads of the five. The same kind of road, simply more of it: traffic per road matches the areas around it while the network itself is larger.

Harlan County and the 4 nearest county-level areas by centroid distance, with the Kentucky average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Harlan County2,0638.2%417,29227.3 min6.6%
Lee County, Virginia2,2939.5%402,57433.4 minN/A
Bell County, Kentucky3,5089.0%462,78632.7 min9.1%
Leslie County, Kentucky1,60612.4%208,04832.6 min5.1%
Hancock County, Tennessee1,7169.6%43,77827.7 min5.7%
Kentucky average4,69612.1%N/A31.7 min14.7%

Harlan County ranked within Kentucky

Truck share on highways places Harlan County #106 of 115 in Kentucky - the bottom quarter of the state.

Harlan County ranked among 120 county-level areas in Kentucky (1 = highest); measures without data in every county rank a smaller field, down to 115.
MeasureHarlan CountyKentucky rank
Traffic volume (AADT)2,063#82 of 120
Highway vehicle-miles per day262,770#72 of 115
Truck share on highways9.1%#106 of 115
Highway trucks per day401#106 of 115
Average travel time27.3 min#109 of 120
Average driver income$43,812#110 of 120
Average driver age50.0 yrs#18 of 120

Harlan County ranks #18 of 120 on average driver age but #106 of 115 on truck share on highways - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Harlan County, Kentucky

On their busiest stretches, the three busiest roads in Harlan County carry 11,863 vehicles a day on average, 5.7 times the typical road in the county (2,063).

US 421 leads with 19,156 vehicles a day, 1,014 of them trucks (5.3%). No other road comes close: US 119, in second place, carries 10,634. It tops the truck ranking too, with the most trucks.

Wilson Cornett Road draws drivers from wealthier areas: their neighborhoods average $58,675 in household income, 34% above the county's $43,812.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 421Trunk road · 19,156vehicles1,014trucks · 5.3%
Road class
Trunk road
Congestion ratio
25.2%
Median trip time
27.8 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$45,582

Travel on US 421's busiest stretch runs 25% over free-flow time, against 7% across the county, so expect slower peak hours.

2US 119Trunk road · 10,634vehicles806trucks · 7.6%
Road class
Trunk road
Median trip time
27.2 min
Drivers’ median age
49.1 yrs
Drivers’ average income
$50,026

At 5.2 times the county average, US 119 draws drivers from neighborhoods averaging $50,026 in household income.

3Pineville RoadTrunk road · 5,798vehicles630trucks · 10.9%
Road class
Trunk road
Congestion ratio
11.7%
Median trip time
35.1 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$40,890

On its busiest stretch, Pineville Road carries 2.8 times the county average; trucks are 10.9% of it, above the county-wide 8.2%.

4Main StreetPrimary road · 5,489vehicles400trucks · 7.3%
Road class
Primary road
Congestion ratio
12.9%
Median trip time
26.4 min
Drivers’ median age
52.1 yrs
Drivers’ average income
$44,111

Main Street peaks at 5,489 vehicles a day, 2.7 times the county average; trucks are 7.3% of it, below the county-wide 8.2%.

5KY 38Secondary road · 5,474vehicles354trucks · 6.5%
Road class
Secondary road
Median trip time
29.0 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$40,020

KY 38 carries 2.7 times the county average at its busiest, 354 of them trucks (6.5%, below the county-wide 8.2%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 421Trunk road · #1 by traffic19,156vehicles1,014trucks · 5.3%
2US 119Trunk road · #2 by traffic10,634vehicles806trucks · 7.6%
3Pineville RoadTrunk road · #3 by traffic5,798vehicles630trucks · 10.9%
4Wilson Cornett RoadTrunk road · 4,748vehicles434trucks · 9.1%
Road class
Trunk road
Median trip time
27.4 min
Drivers’ median age
50.6 yrs
Drivers’ average income
$58,675

Wilson Cornett Road carries 2.3 times the county average on its busiest stretch, where the median trip lasts 27.4 minutes.

5Main StreetPrimary road · #4 by traffic5,489vehicles400trucks · 7.3%
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

HarlanDepartment 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 Harlan County

The same traffic breakdown for the areas closest to Harlan County, Kentucky.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.