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Traffic heat map of Mercer County, Kentucky: 168 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Bluegrass Parkway

Mercer County, Kentucky Traffic Counts

Our Mercer County, Kentucky traffic data covers 2,317 road segments over 168 road miles, with an average segment of just 384 ft. Its busiest road, Bluegrass Parkway, carries 17,135 vehicles a day, 7.0 times the average road. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
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 Mercer County, Kentucky

Traffic

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

vehicles per day2,458
Trucks

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

10.9%
Average travel time

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

32.6 min
Congestion ratio

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

8.6%
Drivers’ average age

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

48.5 yrs
Drivers’ average income

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

$70,195

A typical monitored road in Mercer County, Kentucky sees 2,458 vehicles per day, while its 168 miles of monitored roads together handle 536,836 vehicle-miles traveled per day (≈196 million per year). Trucks are 10.9% of traffic, close to the 12.1% across Kentucky.

Traffic 48% below the Kentucky average

At 2,458 vehicles per day, the average monitored road in Mercer carries 48% less traffic than the state average of 4,696, suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 0.5% of Kentucky's statewide total of vehicle-miles. Mercer carries more traffic than 50% of counties in Kentucky.

The average trip takes 32.6 minutes, on par with the state level. Its average travel time of 32.6 minutes is longer than 66% of counties in Kentucky.

Congestion runs 41% lower than the state level, at a ratio of 8.6%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Mercer County, Kentucky

Trafficvehicles per day7,405
Trucks12.8%
Average travel time36.9 min
Congestion ratio16.7%
Drivers’ average age48.2 yrs
Drivers’ average income$72,161

Highways carry more than half of all travel in Mercer County, Kentucky (67% of vehicle-miles). The average highway carries 7,405 vehicles per day, 278% more than the average non-highway road in the same area, which carries 1,959 vehicles per day.

Highways make up 28% of the monitored road miles (47 miles, 212 segments), so they carry more than their share: 357,266 vehicle-miles traveled per day (≈130 million per year).

By highway travel volume, Mercer outranks 50% of counties in Kentucky.

Passenger-oriented highways

Highway truck concentration here runs 19% lower than the state average, at 12.8%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

58% of counties in Kentucky see a higher highway truck share than Mercer's 12.8%. By raw truck volume, Mercer carries more highway trucks than 54% of counties in Kentucky.

non-highway traffic icon

Non-highway Traffic in Mercer County, Kentucky

Trafficvehicles per day1,959
Trucks7.2%
Average travel time32.1 min
Congestion ratio7.8%
Drivers’ average age49.1 yrs
Drivers’ average income$68,017

Local roads carry a significant share of travel in Mercer County, Kentucky: 33% of all vehicle-miles. The average non-highway road carries 1,959 vehicles per day.

Local roads make up 72% of the monitored road miles (121 miles in 2,105 segments) but carry less than their share of travel: 179,569 vehicle-miles traveled per day (≈65.5 million per year). About 1 in 14 vehicles on non-highway roads is a truck (7.2%).

Drivers from higher-income areas than 80% of counties in Kentucky

Non-highway roads carry a truck concentration that's 44% lower than the highway network.

The non-highway congestion ratio of 7.8% is 44% lower than the state level, suggesting more efficient local mobility than the state average.

Trip origins here have higher average income than 80% of counties in Kentucky. The driver population here skews older than 56% of counties in Kentucky.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Mercer County, Kentucky, the peak hour concentrates about 8% of the day's traffic.

Mercer County vs. Kentucky Traffic Comparison

Mercer County's biggest difference from the Kentucky average is its average daily traffic per road, 48% below it. Its highway truck share is also 19% below.

MetricMercer CountyKentucky averageDifference
Traffic2,4584,696-47.7%
Truck % (Total Traffic)10.9%12.1%-9.3%
Truck % (Highway)12.8%15.9%-19.3%
Avg. Travel Time32.6 min31.7 min+2.9%

How Mercer County compares

Mercer County is the least congested of its nearby counties

Set against the average of the 4 areas nearest to it, Mercer County carries 46.4% less traffic on a typical road and is 38.4% less congested; it has the quietest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Mercer 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
Mercer County2,45810.9%536,83632.6 min8.6%
Boyle County, Kentucky4,8177.2%669,61133.5 min15.1%
Anderson County, Kentucky3,43216.2%828,80333.9 min12.6%
Woodford County, Kentucky4,18413.6%1,191,21732.4 min13.0%
Jessamine County, Kentucky5,9125.9%961,34130.7 min15.3%
Kentucky average4,69612.1%N/A31.7 min14.7%

Mercer County ranked within Kentucky

Average driver income places Mercer County #25 of 120 in Kentucky - the top quarter of the state.

Mercer County ranked among 120 county-level areas in Kentucky (1 = highest); measures without data in every county rank a smaller field, down to 115.
MeasureMercer CountyKentucky rank
Traffic volume (AADT)2,458#60 of 120
Highway vehicle-miles per day357,266#58 of 115
Truck share on highways12.8%#67 of 115
Highway trucks per day949#54 of 115
Average travel time32.6 min#41 of 120
Average driver income$70,195#25 of 120
Average driver age48.5 yrs#53 of 120

Busiest roads in Mercer County, Kentucky

Traffic concentrates on a few corridors: the three busiest roads average 15,742 vehicles a day, against 2,458 on the average road in Mercer County.

Bluegrass Parkway is the busiest road, at 17,135 vehicles a day, 3,767 of them trucks (22.0%). It also carries the most trucks.

Bluegrass Parkway carries longer journeys than most roads here, with a median trip of 63.7 minutes against 32.6 county-wide.

Trucks make up 22.0% of traffic on Bluegrass Parkway, against 10.9% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Bluegrass ParkwayMotorway · 17,135vehicles3,767trucks · 22.0%
Road class
Motorway
Congestion ratio
19.8%
Median trip time
63.7 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$77,262

At 7.0 times the county average, Bluegrass Parkway draws drivers from neighborhoods averaging $77,262 in household income.

2Louisville RoadTrunk road · 16,327vehicles1,468trucks · 9.0%
Road class
Trunk road
Congestion ratio
20.7%
Median trip time
35.5 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$73,122

Travel on Louisville Road's busiest stretch runs 21% over free-flow time, against 9% across the county, so expect slower peak hours.

3Danville RoadTrunk road · 13,763vehicles1,327trucks · 9.6%
Road class
Trunk road
Congestion ratio
14.0%
Median trip time
37.0 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$66,964

A main artery: Danville Road's busiest stretch carries 5.6 times the county average; trucks are 9.6% of it, below the county-wide 10.9%.

4US 127Trunk road · 12,402vehicles1,257trucks · 10.1%
Road class
Trunk road
Congestion ratio
14.8%
Median trip time
39.6 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$74,678

US 127 is a trunk route for the county, carrying 5.0 times the county average on its busiest stretch; trucks are 10.1% of it, below the county-wide 10.9%.

5College StreetPrimary road · 12,395vehicles915trucks · 7.4%
Road class
Primary road
Congestion ratio
25.6%
Median trip time
33.7 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$63,683

College Street is one of the more congested roads here: trips take 26% longer than at free-flow speed, against 9% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Bluegrass ParkwayMotorway · #1 by traffic17,135vehicles3,767trucks · 22.0%
2Louisville RoadTrunk road · #2 by traffic16,327vehicles1,468trucks · 9.0%
3Danville RoadTrunk road · #3 by traffic13,763vehicles1,327trucks · 9.6%
4US 127Trunk road · #4 by traffic12,402vehicles1,257trucks · 10.1%
5US 127 BypassTrunk road · 8,723vehicles941trucks · 10.8%
Road class
Trunk road
Congestion ratio
12.1%
Median trip time
37.2 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$68,752

US 127 Bypass carries 3.5 times the county average at its busiest, 941 of them trucks (10.8%, in line with the county-wide 10.9%).

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

MercerDepartment 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 Mercer County

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

Need segment-level traffic data?

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