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Traffic heat map of Trimble County, Kentucky: 100 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 71 and US 421

Trimble County, Kentucky Traffic Counts

Its highways carry one of the top 5 truck shares of any county in Kentucky. This page breaks down traffic in Trimble County, Kentucky across 100 miles of monitored roads split into 955 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 Trimble County, Kentucky

Traffic

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

vehicles per day2,540
Trucks

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

15.0%
Average travel time

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

33.3 min
Congestion ratio

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

8.5%
Drivers’ average age

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

48.6 yrs
Drivers’ average income

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

$69,772

Our data shows 2,540 vehicles per day on the average road in Trimble County, Kentucky, and 316,123 vehicle-miles traveled per day (≈115 million per year) across its 100 miles of monitored roads. At 15.0%, the truck share runs above the 12.1% across Kentucky: about 1 in 7 vehicles.

Longer trips than 78% of counties in Kentucky

Trimble sees 46% lower average daily traffic volume than the state average (2,540 vehicles per day against 4,696), suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. In total volume terms, its road network carries about 0.3% of Kentucky's statewide total of vehicle-miles. By volume, Trimble's 2,540 vehicles per day outpaces 53% of counties in Kentucky.

Journey times run 5% higher than the state level, at 33.3 minutes on average. Its average travel time of 33.3 minutes is longer than 78% of counties in Kentucky.

The congestion ratio of 8.5% is 43% lower, pointing to smoother traffic flow than the state level - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Trimble County, Kentucky

Trafficvehicles per day18,165
Trucks26.0%
Average travel time59.5 min
Congestion ratio41.1%
Drivers’ average age47.0 yrs
Drivers’ average income$78,753

A significant share of driving in Trimble County, Kentucky, 40% of vehicle-miles, happens on highways. The average highway carries 18,165 vehicles per day, 625% more than the average non-highway road in the same area, which carries 2,507 vehicles per day.

Yet highways are only 7% of the road network, 7 miles in 2 segments, so each mile of them is 5.8 times as busy as the average road mile.

Higher highway truck share than 96% of counties in Kentucky

At 26.0%, highway truck share is 64% higher than the state average. That marks Trimble as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 96% of counties in Kentucky. Trimble's highway truck count is higher than 93% of counties in Kentucky, at roughly 4,721 trucks per day.

non-highway traffic icon

Non-highway Traffic in Trimble County, Kentucky

Trafficvehicles per day2,507
Trucks7.7%
Average travel time33.3 min
Congestion ratio8.4%
Drivers’ average age48.8 yrs
Drivers’ average income$68,245

A little more than half of the driving in Trimble County, Kentucky happens on local roads: 60% of all vehicle-miles. The average non-highway road carries 2,507 vehicles per day.

Spread over 93 miles and 953 segments, 93% of the road network, local roads carry a lighter load per mile: 189,327 vehicle-miles traveled per day (≈69.1 million per year). The truck share on non-highway roads is 7.7%.

Drivers from higher-income areas than 78% of counties in Kentucky

Compared to highways, non-highway routes see 70% fewer trucks by share.

Non-highway congestion (8.4%) runs 40% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have higher average income than 78% of counties in Kentucky. Trimble's median driver age is higher than 57% of counties in Kentucky.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Trimble County vs. Kentucky Traffic Comparison

The highway truck share sets Trimble County apart: 64% above the Kentucky average. Its average daily traffic per road, by contrast, is 46% below.

MetricTrimble CountyKentucky averageDifference
Traffic2,5404,696-45.9%
Truck % (Total Traffic)15.0%12.1%+24.8%
Truck % (Highway)26.0%15.9%+63.8%
Avg. Travel Time33.3 min31.7 min+5.2%

How Trimble County compares

Trimble County moves the least traffic of its nearby counties

Compared with its 4 closest neighbours, Trimble County moves 33.1% of the total daily travel and is 31.4% less congested; it has the fourth busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Trimble 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
Trimble County2,54015.0%316,12333.3 min8.5%
Jefferson County, Indiana4,6457.0%548,20231.9 min11.8%
Carroll County, Kentucky3,18822.1%912,82134.5 min15.6%
Henry County, Kentucky2,04819.1%819,55331.1 min7.9%
Oldham County, Kentucky5,32612.4%1,534,78025.5 min13.9%
Kentucky average4,69612.1%N/A31.7 min14.7%

Trimble County ranked within Kentucky

Trimble County sits in the top quarter of the Kentucky field on truck share on highways, at #5 of 115.

Trimble County ranked among 120 county-level areas in Kentucky (1 = highest); measures without data in every county rank a smaller field, down to 115.
MeasureTrimble CountyKentucky rank
Traffic volume (AADT)2,540#57 of 120
Highway vehicle-miles per day126,796#92 of 115
Truck share on highways26.0%#5 of 115
Highway trucks per day4,721#9 of 115
Average travel time33.3 min#27 of 120
Average driver income$69,772#27 of 120
Average driver age48.6 yrs#52 of 120

The two ends of this table sit far apart: #5 of 115 on truck share on highways, against #92 of 115 on highway travel volume.

Busiest roads in Trimble County, Kentucky

Traffic concentrates on a few corridors: the three busiest roads average 16,246 vehicles a day, against 2,540 on the average road in Trimble County.

I 71 is the busiest road, at 36,283 vehicles a day, 9,431 of them trucks (26.0%). No other road comes close: US 421, in second place, carries 7,030. It also carries the most trucks.

I 71 carries longer journeys than most roads here, with a median trip of 59.5 minutes against 33.3 county-wide.

Trucks make up 26.0% of traffic on I 71, against 15.0% across all roads in the county.

Few trucks use US 421: 6.7% of its traffic, under half the county's 15.0%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 71Motorway · 36,283vehicles9,431trucks · 26.0%
Road class
Motorway
Congestion ratio
41.1%
Median trip time
59.5 min
Drivers’ median age
47.0 yrs
Drivers’ average income
$78,753

Travel on I 71's busiest stretch runs 41% over free-flow time, against 8% across the county, so expect slower peak hours.

2US 421Primary road · 7,030vehicles474trucks · 6.7%
Road class
Primary road
Congestion ratio
15.5%
Median trip time
31.5 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$68,987

US 421 is one of the more congested roads here: trips take 16% longer than at free-flow speed, against 8% county-wide.

3Brownsboro RoadPrimary road · 5,425vehicles680trucks · 12.5%
Road class
Primary road
Median trip time
37.4 min
Drivers’ median age
47.4 yrs
Drivers’ average income
$76,678

Brownsboro Road carries 2.1 times the county average on its busiest stretch, where the median trip lasts 37.4 minutes.

4Main StreetPrimary road · 5,231vehicles420trucks · 8.0%
Road class
Primary road
Median trip time
34.6 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$69,237

At 2.1 times the county average, Main Street draws drivers from neighborhoods averaging $69,237 in household income.

5KY 36Secondary road · 4,675vehicles394trucks · 8.4%
Road class
Secondary road
Median trip time
34.5 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$63,383

KY 36 carries 84% more than the county average on its busiest stretch, where the median trip lasts 34.5 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 71Motorway · #1 by traffic36,283vehicles9,431trucks · 26.0%
2Brownsboro RoadPrimary road · #3 by traffic5,425vehicles680trucks · 12.5%
3US 421Primary road · #2 by traffic7,030vehicles474trucks · 6.7%
4Main StreetPrimary road · #4 by traffic5,231vehicles420trucks · 8.0%
5KY 36Secondary road · #5 by traffic4,675vehicles394trucks · 8.4%
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

TrimbleDepartment 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 Trimble County

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

Need segment-level traffic data?

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