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Carroll County, Illinois Traffic Counts

This page delivers traffic analytics for Carroll County, Illinois. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Carroll County, Illinois among 187 road miles divided in 1,266 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 782 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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Total Traffic Volume & Performance

Traffic

Traffic

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

2,135

Trucks

Trucks

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

8.5%

Average travel time

Average travel time

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

35.2 min

Congestion ratio

Congestion ratio

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

8.0%

Drivers’ average age

Drivers’ average age

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

52.0 yrs

Drivers’ average income

Drivers’ average income

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

$63,859

Our data indicates an estimated average traffic volume of 2,135 vehicles per day in Carroll County, Illinois that results in 310,090 vehicle-miles traveled per day (≈113 million per year). The traffic stream is comprised of an average of 1 truck for every 12 vehicles. Typical time spent behind the wheel per trip is 35.2 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Illinois state averages: At 2,135 vehicles per day, the average monitored road in Carroll carries 75% less traffic than the state average of 8,480 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 310,090 vehicle-miles traveled per day (≈113 million per year), roughly 0.1% of Illinois's statewide total. At 35.2 minutes, the average travel time is 3% higher than the state level. Congestion runs 61% lower than the state level, at a ratio of 8.0% - smoother traffic flow - crucial for traffic control improvement and logistics planning. Carroll carries more traffic than 18% of counties in Illinois. Its average travel time of 35.2 minutes is longer than 75% of counties in Illinois.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

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

2,135

Trucks

Trucks

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

8.5%

Average travel time

Average travel time

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

35.2 min

Congestion ratio

Congestion ratio

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

8.0%

Drivers’ average age

Drivers’ average age

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

52.0 yrs

Drivers’ average income

Drivers’ average income

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

$63,859

The non-highway road network in Carroll County, Illinois supports a substantial volume of traffic. The average non-highway road carries 2,135 vehicles per day. That average covers 187 non-highway road miles divided in 1,266 segments (average segment length 782 ft), together carrying 310,090 vehicle-miles traveled per day (≈113 million per year). Trucks constitute 8.5% of non-highway traffic.

Analytical insight

Non-highway congestion (8.0%) runs 61% lower than the state average, pointing to smoother local traffic flow. 75% of counties in Illinois see shorter overall travel times than Carroll. Trip origins here have higher average income than 21% of counties in Illinois. The driver population here skews older than 89% of counties in Illinois.

Time-of-Day & Seasonal Patterns

Analytical insight

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

Traffic Flow Profile Comparison

Metric

Carroll

Illinois
Average

Difference

Traffic

2,135

8,480

-74.8%

Truck % (Total Traffic)

8.5%

10.2%

-16.6%

Truck % (Highway)

17.3%

Avg. Travel Time

35.2 min

34.1 min

+3.3%

How Carroll County compares

Carroll County against nearby areas

Against the 4 nearest areas, Carroll County moves 29.3% of the total daily travel and carries 31.6% 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 Illinois average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Carroll County2,1358.5%310,09035.2 min8.0%
Jo Daviess County, Illinois2,22910.8%485,59433.7 min6.9%
Whiteside County, Illinois3,74112.9%1,256,20034.9 min10.9%
Stephenson County, Illinois2,9798.1%893,93833.9 min10.1%
Ogle County, Illinois3,53216.1%1,600,41731.8 min10.2%
Illinois average8,48010.2%N/A34.1 min20.6%

Carroll County ranked within Illinois

Average driver age places Carroll County #12 of 102 in Illinois - the top quarter of the state.

Where Carroll County sits among Illinois's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureCarroll CountyIllinois rank
Traffic volume (AADT)2,135#84 of 102
Average travel time35.2 min#26 of 102
Average driver income$63,859#81 of 102
Average driver age52.0 yrs#12 of 102

The two ends of this table sit far apart: #12 of 102 on average driver age, against #84 of 102 on average daily traffic volume.

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

IllinoisDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near Carroll County

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

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