Need segment-level traffic data?

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

Get insights →
Traffic heat map of Carroll County, Indiana: 163 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Hoosier Heartland Highway

Carroll County, Indiana Traffic Counts

Our Carroll County, Indiana traffic data covers 2,109 road segments over 163 road miles, with an average segment of just 409 ft. Its busiest road, Hoosier Heartland Highway, carries 8,457 vehicles a day, 3.0 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
Find my place
total traffic icon

Total Traffic Volume & Performance in Carroll County, Indiana

Traffic

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

vehicles per day2,815
Trucks

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

10.5%
Average travel time

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

34.1 min
Congestion ratio

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

8.8%
Drivers’ average age

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

48.9 yrs
Drivers’ average income

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

$67,357

A typical monitored road in Carroll County, Indiana sees 2,815 vehicles per day, while its 163 miles of monitored roads together handle 462,194 vehicle-miles traveled per day (≈169 million per year). About 1 in 10 vehicles is a truck, in line with Indiana (12.1%).

Traffic 51% below the Indiana average

Carroll sees 51% lower average daily traffic volume than the state average (2,815 vehicles per day against 5,704), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Carroll accounts for about 0.3% of Indiana's statewide total of vehicle-miles. 75% of counties in Indiana see more traffic than Carroll's 2,815 vehicles per day.

At 34.1 minutes, the average travel time matches the state level closely. 53% of counties in Indiana have a longer average travel time than Carroll's 34.1 minutes.

The congestion ratio of 8.8% 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 Carroll County, Indiana

Trafficvehicles per day4,288
Trucks14.8%
Average travel time42.1 min
Congestion ratio9.9%
Drivers’ average age47.7 yrs
Drivers’ average income$63,221

A significant share of driving in Carroll County, Indiana, 31% of vehicle-miles, happens on highways. The average highway carries 4,288 vehicles per day, 55% more than the average non-highway road in the same area, which carries 2,768 vehicles per day.

Highways make up 21% of the monitored road miles (34 miles, 65 segments), so they carry more than their share: 143,551 vehicle-miles traveled per day (≈52.4 million per year).

Fewer highway trucks than 91% of counties in Indiana

Highway truck concentration here runs 24% lower than the state average, at 14.8%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Carroll's highway truck share (14.8%) is lower than 78% of counties in Indiana. 91% of counties in Indiana see more highway trucks per day than Carroll's roughly 636.

non-highway traffic icon

Non-highway Traffic in Carroll County, Indiana

Trafficvehicles per day2,768
Trucks8.6%
Average travel time33.8 min
Congestion ratio8.8%
Drivers’ average age49.1 yrs
Drivers’ average income$68,396

A little more than half of the driving in Carroll County, Indiana happens on local roads: 69% of all vehicle-miles. On the average non-highway road, that comes to 2,768 vehicles per day.

Their share of road miles is similar, 79% (130 miles in 2,044 segments), carrying 318,642 vehicle-miles traveled per day (≈116 million per year). The truck share on non-highway roads is 8.6%.

Drivers from lower-income areas than 74% of counties in Indiana

The concentration of trucks on non-highway roads is 42% lower than on highways.

The non-highway congestion ratio of 8.8% is 42% lower than the state level, suggesting more efficient local mobility than the state average.

74% of counties in Indiana see higher average driver income among trip origins than Carroll. The driver population here skews older than 67% of counties in Indiana.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 85% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 18% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +16% versus the annual average.
Lowest month:
January is the quietest month, with volumes -17% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Carroll County, Indiana, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +16% in high season.

Carroll County vs. Indiana Traffic Comparison

Carroll County's biggest difference from the Indiana average is its average daily traffic per road, 51% below it. Its highway truck share is also 24% below.

MetricCarroll CountyIndiana averageDifference
Traffic2,8155,704-50.7%
Truck % (Total Traffic)10.5%12.1%-13.1%
Truck % (Highway)14.8%19.6%-24.2%
Avg. Travel Time34.1 min33.5 min+1.6%

How Carroll County compares

Carroll County moves the least traffic of its nearby counties

Set against the average of the 4 areas nearest to it, Carroll County moves 28.3% of the total daily travel and carries 35.7% less traffic on a typical road; it has the quietest roads of the five. Quieter and more local than the areas around it on both counts: less traffic, and less of what there is arriving by truck.

Carroll 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
Carroll County2,81510.5%462,19434.1 min8.8%
Cass County, Indiana3,95610.5%689,29637.5 min12.8%
White County, Indiana3,62221.2%1,103,45536.1 min9.7%
Tippecanoe County, Indiana5,81813.1%3,477,24934.8 min15.2%
Clinton County, Indiana4,10318.3%1,251,30237.7 min12.1%
Indiana average5,70412.1%N/A33.5 min15.6%

Carroll County ranked within Indiana

Carroll County sits in the bottom quarter of the Indiana field on highway truck volume, at #72 of 79.

Carroll County ranked among 92 county-level areas in Indiana (1 = highest); measures without data in every county rank a smaller field, down to 79.
MeasureCarroll CountyIndiana rank
Traffic volume (AADT)2,815#69 of 92
Highway vehicle-miles per day143,551#69 of 79
Truck share on highways14.8%#62 of 79
Highway trucks per day636#72 of 79
Average travel time34.1 min#49 of 92
Average driver income$67,357#68 of 92
Average driver age48.9 yrs#31 of 92

Busiest roads in Carroll County, Indiana

Traffic concentrates on a few corridors: the three busiest roads average 7,979 vehicles a day, against 2,815 on the average road in Carroll County.

Hoosier Heartland Highway is the busiest road, at 8,457 vehicles a day, 1,255 of them trucks (14.8%). It also carries the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Hoosier Heartland HighwayTrunk road · 8,457vehicles1,255trucks · 14.8%
Road class
Trunk road
Congestion ratio
9.9%
Median trip time
42.1 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$63,221

The busiest stretch of Hoosier Heartland Highway carries 3.0 times the county average; trucks are 14.8% of it, above the county-wide 10.5%.

2Main StreetPrimary road · 7,874vehicles598trucks · 7.6%
Road class
Primary road
Congestion ratio
17.5%
Median trip time
34.2 min
Drivers’ median age
49.1 yrs
Drivers’ average income
$64,968

Main Street is one of the more congested roads here: trips take 18% longer than at free-flow speed, against 9% county-wide.

3Washington StreetPrimary road · 7,605vehicles529trucks · 7.0%
Road class
Primary road
Congestion ratio
18.2%
Median trip time
31.6 min
Drivers’ median age
48.7 yrs
Drivers’ average income
$63,701

Delays build on Washington Street: its congestion ratio of 18% over free-flow time is well above the county's 9%.

4US 421Primary road · 6,837vehicles803trucks · 11.8%
Road class
Primary road
Congestion ratio
16.4%
Median trip time
32.7 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$69,374

On its busiest stretch, US 421 carries 2.4 times the county average; trucks are 11.8% of it, above the county-wide 10.5%.

5Michigan StreetPrimary road · 4,195vehicles423trucks · 10.1%
Road class
Primary road
Congestion ratio
10.6%
Median trip time
42.4 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$72,467

Michigan Street carries 49% more than the county average on its busiest stretch, where the median trip lasts 42.4 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Hoosier Heartland HighwayTrunk road · #1 by traffic8,457vehicles1,255trucks · 14.8%
2US 421Primary road · #4 by traffic6,837vehicles803trucks · 11.8%
3Main StreetPrimary road · #2 by traffic7,874vehicles598trucks · 7.6%
4Washington StreetPrimary road · #3 by traffic7,605vehicles529trucks · 7.0%
5SR 29Primary road · 3,732vehicles447trucks · 12.0%
Road class
Primary road
Congestion ratio
8.7%
Median trip time
41.1 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$61,429

At 33% more than the county average, SR 29 draws drivers from neighborhoods averaging $61,429 in household income.

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

CarrollDepartment 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.
link arrow icon
Data current as of:
Q3 2026

Explore further

TrafficZoom platform

— street-level analytics and custom corridor reports.

Map AI

— demographics, housing and mobility data.

Counties near Carroll County

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

Need segment-level traffic data?

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