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Traffic heat map of Clay County, Indiana: 249 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 70 and National Avenue

Clay County, Indiana Traffic Counts

Its busiest road, I 70, carries 26,097 vehicles a day, 8.8 times the average road. This page breaks down traffic in Clay County, Indiana across 249 miles of monitored roads split into 4,001 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 Clay County, Indiana

Traffic

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

vehicles per day2,952
Trucks

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

18.1%
Average travel time

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

33.7 min
Congestion ratio

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

9.2%
Drivers’ average age

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

46.1 yrs
Drivers’ average income

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

$73,914

A typical monitored road in Clay County, Indiana sees 2,952 vehicles per day, while its 249 miles of monitored roads together handle 900,494 vehicle-miles traveled per day (≈329 million per year). Trucks are 18.1% of traffic, more than the 12.1% across Indiana.

Traffic 48% below the Indiana average

Clay's average daily traffic volume is 48% lower than the state average - 2,952 vehicles per day against 5,704 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Clay accounts for about 0.6% of Indiana's statewide total of vehicle-miles. 70% of counties in Indiana see more traffic than Clay's 2,952 vehicles per day.

At 33.7 minutes, the average travel time matches the state level closely. 60% of counties in Indiana have a longer average travel time than Clay's 33.7 minutes.

The congestion ratio of 9.2% is 41% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Clay County, Indiana

Trafficvehicles per day13,861
Trucks31.0%
Average travel time55.8 min
Congestion ratio31.9%
Drivers’ average age46.4 yrs
Drivers’ average income$76,309

Highways carry about half of all travel in Clay County, Indiana, 46% of vehicle-miles. The average highway carries 13,861 vehicles per day, 386% more than the average non-highway road in the same area, which carries 2,853 vehicles per day.

That comes from just 11% of the monitored road miles: 27 miles in 36 segments, carrying 413,929 vehicle-miles traveled per day (≈151 million per year).

Higher highway truck share than 90% of counties in Indiana

Highway truck concentration here runs 58% higher than the state average, at 31.0%. That marks Clay as a major freight corridor, where highway access is what logistics operators compete on.

90% of counties in Indiana see a lower highway truck share than Clay's 31.0%. 86% of counties in Indiana see fewer highway trucks per day than Clay's roughly 4,297.

non-highway traffic icon

Non-highway Traffic in Clay County, Indiana

Trafficvehicles per day2,853
Trucks7.1%
Average travel time33.5 min
Congestion ratio9.0%
Drivers’ average age46.0 yrs
Drivers’ average income$73,423

Local roads carry about half of all travel in Clay County, Indiana, 54% of vehicle-miles. On the average non-highway road, that comes to 2,853 vehicles per day.

Local roads make up 89% of the monitored road miles (222 miles in 3,965 segments) but carry less than their share of travel: 486,566 vehicle-miles traveled per day (≈178 million per year). Trucks make up 7.1% of non-highway traffic, about 1 in 14 vehicles.

Younger drivers than 81% of counties in Indiana

Non-highway roads carry a truck concentration that's 77% lower than the highway network.

The non-highway congestion ratio of 9.0% is 41% lower than the state level, suggesting more efficient local mobility than the state average.

51% of counties in Indiana see lower average driver income among trip origins than Clay. The driver population here skews younger than 81% of counties in Indiana.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Clay County vs. Indiana Traffic Comparison

Of the four measures, highway truck share differs most: Clay County runs 58% above the Indiana average. Its truck share is also 50% above.

MetricClay CountyIndiana averageDifference
Traffic2,9525,704-48.2%
Truck % (Total Traffic)18.1%12.1%+49.7%
Truck % (Highway)31.0%19.6%+58.3%
Avg. Travel Time33.7 min33.5 min+0.6%

How Clay County compares

Clay County has a higher truck share than any nearby county

Against the 4 nearest areas, Clay County runs 7.7 percentage points more truck traffic and is 29.0% less congested; it has the fourth 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.

Clay County and the 4 nearest county-level areas by centroid distance, with the Indiana average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Clay County2,95218.1%900,49433.7 min9.2%
Vigo County, Indiana5,78712.3%2,041,20534.2 min16.3%
Owen County, Indiana3,5459.0%366,05438.9 min14.5%
Greene County, Indiana3,43811.7%783,75032.6 min11.5%
Parke County, Indiana2,1828.4%271,93335.7 min9.2%
Indiana average5,70412.1%N/A33.5 min15.6%

Clay County ranked within Indiana

Truck share on highways places Clay County #9 of 79 in Indiana - the top quarter of the state.

Clay County ranked among 92 county-level areas in Indiana (1 = highest); measures without data in every county rank a smaller field, down to 79.
MeasureClay CountyIndiana rank
Traffic volume (AADT)2,952#65 of 92
Highway vehicle-miles per day413,929#51 of 79
Truck share on highways31.0%#9 of 79
Highway trucks per day4,297#12 of 79
Average travel time33.7 min#56 of 92
Average driver income$73,914#46 of 92
Average driver age46.1 yrs#75 of 92

The two ends of this table sit far apart: #9 of 79 on truck share on highways, against #75 of 92 on average driver age.

Busiest roads in Clay County, Indiana

Traffic concentrates on a few corridors: the three busiest roads average 18,342 vehicles a day, against 2,952 on the average road in Clay County.

I 70 leads with 26,097 vehicles a day, 8,182 of them trucks (31.4%). That is 68% more than the next road, National Avenue (15,530). It also carries the most trucks.

Trips using Dwight D Eisenhower Highway are long: a median of 73.8 minutes against 33.7 county-wide, the mark of a through route.

Trucks make up 31.4% of traffic on I 70 and 29.1% on Dwight D Eisenhower Highway, against 18.1% across all roads in the county.

Few trucks use National Avenue: 5.4% of its traffic, under half the county's 18.1%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 70Motorway · 26,097vehicles8,182trucks · 31.4%
Road class
Motorway
Congestion ratio
31.9%
Median trip time
54.7 min
Drivers’ median age
46.4 yrs
Drivers’ average income
$75,644

Travel on I 70's busiest stretch runs 32% over free-flow time, against 9% across the county, so expect slower peak hours.

2National AvenuePrimary road · 15,530vehicles836trucks · 5.4%
Road class
Primary road
Congestion ratio
25.6%
Median trip time
32.4 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$69,707

A main artery: National Avenue's busiest stretch carries 5.3 times the county average; trucks are 5.4% of it, below the county-wide 18.1%.

3Dwight D Eisenhower HighwayMotorway · 13,398vehicles3,903trucks · 29.1%
Road class
Motorway
Median trip time
73.8 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$83,848

At 4.5 times the county average, Dwight D Eisenhower Highway draws drivers from neighborhoods averaging $83,848 in household income.

4US 40Primary road · 10,670vehicles842trucks · 7.9%
Road class
Primary road
Congestion ratio
13.3%
Median trip time
35.0 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$74,708

The busiest stretch of US 40 carries 3.6 times the county average; trucks are 7.9% of it, below the county-wide 18.1%.

5Forest AvenueSecondary road · 9,986vehicles441trucks · 4.4%
Road class
Secondary road
Congestion ratio
28.3%
Median trip time
34.3 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$72,219

Forest Avenue is one of the more congested roads here: trips take 28% longer than at free-flow speed, against 9% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 70Motorway · #1 by traffic26,097vehicles8,182trucks · 31.4%
2Dwight D Eisenhower HighwayMotorway · #3 by traffic13,398vehicles3,903trucks · 29.1%
3US 40Primary road · #4 by traffic10,670vehicles842trucks · 7.9%
4National AvenuePrimary road · #2 by traffic15,530vehicles836trucks · 5.4%
5Forest AvenueSecondary road · #5 by traffic9,986vehicles441trucks · 4.4%
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

ClayDepartment 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 Clay County

The same traffic breakdown for the areas closest to Clay County, Indiana.

Need segment-level traffic data?

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