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Traffic heat map of Simpson County, Kentucky: 178 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 65 and Main Street

Simpson County, Kentucky Traffic Counts

Its highways carry the highest truck share of any county in Kentucky, 29.3%. This page breaks down traffic in Simpson County, Kentucky across 178 miles of monitored roads split into 2,891 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 Simpson County, Kentucky

Traffic

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

vehicles per day3,751
Trucks

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

20.8%
Average travel time

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

28.4 min
Congestion ratio

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

14.4%
Drivers’ average age

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

44.3 yrs
Drivers’ average income

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

$66,013

Our data shows 3,751 vehicles per day on the average road in Simpson County, Kentucky, and 842,754 vehicle-miles traveled per day (≈308 million per year) across its 178 miles of monitored roads. About 1 in 5 vehicles is a truck, well above the 12.1% across Kentucky - a freight-heavy mix.

Shorter trips than 86% of counties in Kentucky

Simpson's average daily traffic volume is 20% lower than the state average - 3,751 vehicles per day against 4,696 - suggesting less traffic load per road - a critical factor for logistics and site planning. In total volume terms, its road network carries about 0.7% of Kentucky's statewide total of vehicle-miles. 77% of counties in Kentucky see less traffic than Simpson's 3,751 vehicles per day.

The average trip takes 28.4 minutes, 10% lower than the state level. 86% of counties in Kentucky have a longer average travel time than Simpson's 28.4 minutes.

At 14.4%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Simpson County, Kentucky

Trafficvehicles per day17,588
Trucks29.3%
Average travel time58.6 min
Congestion ratio28.0%
Drivers’ average age42.2 yrs
Drivers’ average income$70,778

Highways carry more than half of all travel in Simpson County, Kentucky (61% of vehicle-miles). The average highway carries 17,588 vehicles per day, 390% more than the average non-highway road in the same area, which carries 3,586 vehicles per day.

That comes from just 15% of the monitored road miles: 27 miles in 34 segments, carrying 515,352 vehicle-miles traveled per day (≈188 million per year).

61% of counties in Kentucky move less traffic on their highways.

The highest highway truck share of any county in Kentucky

The concentration of trucks on highways (29.3%) is 85% higher than the state average for similar road classifications. That marks Simpson as a major freight corridor, where highway access is what logistics operators compete on.

By share, Simpson has the highest highway truck concentration in Kentucky, at 29.3%. 97% of counties in Kentucky see fewer highway trucks per day than Simpson's roughly 5,158.

non-highway traffic icon

Non-highway Traffic in Simpson County, Kentucky

Trafficvehicles per day3,586
Trucks7.5%
Average travel time28.1 min
Congestion ratio14.2%
Drivers’ average age44.8 yrs
Drivers’ average income$63,187

Local roads carry a significant share of travel in Simpson County, Kentucky: 39% of all vehicle-miles. On the average non-highway road, that comes to 3,586 vehicles per day.

Local roads make up 85% of the monitored road miles (151 miles in 2,857 segments) but carry less than their share of travel: 327,402 vehicle-miles traveled per day (≈120 million per year). The truck share on non-highway roads is 7.5%.

Younger drivers than 96% of counties in Kentucky

Non-highway roads carry a truck concentration that's 74% lower than the highway network.

The non-highway congestion ratio of 14.2% is in line with the state level.

Trip origins here have higher average income than 69% of counties in Kentucky. The driver population here skews younger than 96% of counties in Kentucky.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Simpson County vs. Kentucky Traffic Comparison

The highway truck share sets Simpson County apart: 85% above the Kentucky average. Its truck share is also 73% above.

MetricSimpson CountyKentucky averageDifference
Traffic3,7514,696-20.1%
Truck % (Total Traffic)20.8%12.1%+72.9%
Truck % (Highway)29.3%15.9%+84.8%
Avg. Travel Time28.4 min31.7 min-10.3%

How Simpson County compares

Simpson County has a higher truck share than any nearby county

Compared with its 4 closest neighbours, Simpson County runs 10.4 percentage points more truck traffic and moves 38.4% of the total daily travel; it has the third busiest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.

Simpson 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
Simpson County3,75120.8%842,75428.4 min14.4%
Logan County, Kentucky1,92610.0%743,64633.0 min6.3%
Warren County, Kentucky7,04914.8%4,012,35932.1 min19.7%
Allen County, Kentucky2,6609.4%480,89928.8 min11.1%
Sumner County, Tennessee9,4937.7%3,544,57530.2 min20.9%
Kentucky average4,69612.1%N/A31.7 min14.7%

Simpson County ranked within Kentucky

On truck share on highways, Simpson County tops the Kentucky field outright.

Simpson County ranked among 120 county-level areas in Kentucky (1 = highest); measures without data in every county rank a smaller field, down to 115.
MeasureSimpson CountyKentucky rank
Traffic volume (AADT)3,751#28 of 120
Highway vehicle-miles per day515,352#45 of 115
Truck share on highways29.3%#1 of 115
Highway trucks per day5,158#4 of 115
Average travel time28.4 min#103 of 120
Average driver income$66,013#38 of 120
Average driver age44.3 yrs#115 of 120

Simpson County ranks #1 of 115 on truck share on highways but #115 of 120 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Simpson County, Kentucky

Traffic concentrates on a few corridors: the three busiest roads average 20,238 vehicles a day, against 3,751 on the average road in Simpson County.

I 65 leads with 37,564 vehicles a day, 11,017 of them trucks (29.3%). No other road comes close: Main Street, in second place, carries 12,367. It also carries the most trucks.

Trips using I 65 are long: a median of 58.6 minutes against 28.4 county-wide, the mark of a through route.

Main Street is busy with cars rather than freight: only 5.1% of its traffic is trucks, against 20.8% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 65Motorway · 37,564vehicles11,017trucks · 29.3%
Road class
Motorway
Congestion ratio
28.0%
Median trip time
58.6 min
Drivers’ median age
42.2 yrs
Drivers’ average income
$70,778

Travel on I 65's busiest stretch runs 28% over free-flow time, against 14% across the county, so expect slower peak hours.

2Main StreetPrimary road · 12,367vehicles636trucks · 5.1%
Road class
Primary road
Congestion ratio
28.9%
Median trip time
27.8 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$63,891

Main Street is one of the more congested roads here: trips take 29% longer than at free-flow speed, against 14% county-wide.

3KY 100Primary road · 10,782vehicles682trucks · 6.3%
Road class
Primary road
Median trip time
28.2 min
Drivers’ median age
45.7 yrs
Drivers’ average income
$61,495

On its busiest stretch, KY 100 carries 2.9 times the county average; trucks are 6.3% of it, below the county-wide 20.8%.

4Nashville RoadPrimary road · 9,380vehicles859trucks · 9.2%
Road class
Primary road
Congestion ratio
25.5%
Median trip time
28.1 min
Drivers’ median age
44.9 yrs
Drivers’ average income
$69,276

Nashville Road peaks at 9,380 vehicles a day, 2.5 times the county average; trucks are 9.2% of it, below the county-wide 20.8%.

5Bowling Green RoadPrimary road · 8,185vehicles723trucks · 8.8%
Road class
Primary road
Congestion ratio
21.7%
Median trip time
30.7 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$66,627

Bowling Green Road carries 2.2 times the county average at its busiest, 723 of them trucks (8.8%, below the county-wide 20.8%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 65Motorway · #1 by traffic37,564vehicles11,017trucks · 29.3%
2Nashville RoadPrimary road · #4 by traffic9,380vehicles859trucks · 9.2%
3Bowling Green RoadPrimary road · #5 by traffic8,185vehicles723trucks · 8.8%
4KY 100Primary road · #3 by traffic10,782vehicles682trucks · 6.3%
5Main StreetPrimary road · #2 by traffic12,367vehicles636trucks · 5.1%
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

SimpsonDepartment 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 Simpson County

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

Need segment-level traffic data?

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