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Traffic heat map of Iroquois County, Illinois: 383 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 57 and Walnut Street

Iroquois County, Illinois Traffic Counts

How busy are the roads of Iroquois County, Illinois? We measure 383 road miles, divided into 1,985 segments, with multi-sourced, cross-verified mobile and sensor data. About 1 in 5 vehicles here is a truck, against 1 in 10 across Illinois. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Iroquois County, Illinois

Traffic

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

vehicles per day2,418
Trucks

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

20.9%
Average travel time

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

33.8 min
Congestion ratio

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

7.1%
Drivers’ average age

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

47.9 yrs
Drivers’ average income

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

$66,918

A typical monitored road in Iroquois County, Illinois sees 2,418 vehicles per day, while its 383 miles of monitored roads together handle 1,228,450 vehicle-miles traveled per day (≈448 million per year). About 1 in 5 vehicles is a truck, well above the 10.2% across Illinois - a freight-heavy mix.

Traffic 71% below the Illinois average

Iroquois's average daily traffic volume is 71% lower than the state average - 2,418 vehicles per day against 8,480 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Iroquois accounts for about 0.5% of Illinois's statewide total of vehicle-miles. 69% of counties in Illinois see more traffic than Iroquois's 2,418 vehicles per day.

The average trip takes 33.8 minutes, on par with the state level. Its average travel time of 33.8 minutes is longer than 54% of counties in Illinois.

The congestion ratio of 7.1% is 65% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Iroquois County, Illinois

Trafficvehicles per day8,082
Trucks29.9%
Average travel time75.6 min
Congestion ratio18.3%
Drivers’ average age43.3 yrs
Drivers’ average income$76,079

Highways carry more than half of all travel in Iroquois County, Illinois (57% of vehicle-miles). The average highway carries 8,082 vehicles per day, 275% more than the average non-highway road in the same area, which carries 2,155 vehicles per day.

With 20% of the road miles (78 miles in 88 segments), highways punch above their length, carrying 694,599 vehicle-miles traveled per day (≈254 million per year).

60% of counties in Illinois move less traffic on their highways.

A major freight corridor

The concentration of trucks on highways (29.9%) is 72% higher than the state average for similar road classifications. That marks Iroquois as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 86% of counties in Illinois. 67% of counties in Illinois see fewer highway trucks per day than Iroquois's roughly 2,416.

non-highway traffic icon

Non-highway Traffic in Iroquois County, Illinois

Trafficvehicles per day2,155
Trucks9.3%
Average travel time31.9 min
Congestion ratio6.6%
Drivers’ average age51.1 yrs
Drivers’ average income$64,785

Local roads carry a significant share of travel in Iroquois County, Illinois: 43% of all vehicle-miles. A typical local road sees 2,155 vehicles per day.

Spread over 304 miles and 1,897 segments, 80% of the road network, local roads carry a lighter load per mile: 533,851 vehicle-miles traveled per day (≈195 million per year). Trucks make up 9.3% of non-highway traffic, about 1 in 11 vehicles.

Local congestion 68% below the Illinois average

Compared to highways, non-highway routes see 69% fewer trucks by share.

Non-highway congestion (6.6%) runs 68% lower than the state average, pointing to smoother local traffic flow.

Iroquois's average driver income is lower than 69% of counties in Illinois. 71% of counties in Illinois have an older driver population than Iroquois.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Iroquois County vs. Illinois Traffic Comparison

The truck share sets Iroquois County apart: 106% above the Illinois average. Its highway truck share is also 72% above.

MetricIroquois CountyIllinois averageDifference
Traffic2,4188,480-71.5%
Truck % (Total Traffic)20.9%10.2%+105.8%
Truck % (Highway)29.9%17.3%+72.5%
Avg. Travel Time33.8 min34.1 min-0.8%

How Iroquois County compares

Iroquois County has a higher truck share than any nearby county

Against the 4 nearest areas, Iroquois County runs 5.5 percentage points more truck traffic; it has the third busiest roads of the five. Traffic volume here matches the areas around it, but more of that traffic is trucks - a difference in what routes through, not in how much.

Iroquois 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
Iroquois County2,41820.9%1,228,45033.8 min7.1%
Ford County, Illinois2,20117.8%532,71835.4 min7.6%
Kankakee County, Illinois5,19413.0%2,240,81634.3 min13.4%
Newton County, Indiana2,46419.0%472,82242.7 min6.7%
Benton County, Indiana1,31211.8%232,06734.6 min4.0%
Illinois average8,48010.2%N/A34.1 min20.6%

Iroquois County ranked within Illinois

Iroquois County sits in the top quarter of the Illinois field on truck share on highways, at #12 of 82.

Iroquois County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureIroquois CountyIllinois rank
Traffic volume (AADT)2,418#71 of 102
Highway vehicle-miles per day694,599#33 of 82
Truck share on highways29.9%#12 of 82
Highway trucks per day2,416#28 of 82
Average travel time33.8 min#47 of 102
Average driver income$66,918#71 of 102
Average driver age47.9 yrs#73 of 102

Busiest roads in Iroquois County, Illinois

On their busiest stretches, the three busiest roads in Iroquois County carry 10,847 vehicles a day on average, 4.5 times the typical road in the county (2,418).

I 57 is the busiest road, at 17,427 vehicles a day, 5,209 of them trucks (29.9%). No other road comes close: Walnut Street, in second place, carries 8,335. It tops the truck ranking too, with the most trucks.

Trips using I 57 are long: a median of 75.6 minutes against 33.8 county-wide, the mark of a through route.

Crescent Street is busy with cars rather than freight: only 6.4% of its traffic is trucks, against 20.9% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 57Motorway · 17,427vehicles5,209trucks · 29.9%
Road class
Motorway
Congestion ratio
18.3%
Median trip time
75.6 min
Drivers’ median age
43.3 yrs
Drivers’ average income
$76,079

Travel on I 57's busiest stretch runs 18% over free-flow time, against 7% across the county, so expect slower peak hours.

2Walnut StreetPrimary road · 8,335vehicles685trucks · 8.2%
Road class
Primary road
Congestion ratio
19.5%
Median trip time
34.8 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$55,720

Walnut Street is one of the more congested roads here: trips take 19% longer than at free-flow speed, against 7% county-wide.

3Crescent StreetPrimary road · 6,779vehicles432trucks · 6.4%
Road class
Primary road
Congestion ratio
14.4%
Median trip time
28.5 min
Drivers’ median age
51.2 yrs
Drivers’ average income
$67,018

The busiest stretch of Crescent Street carries 2.8 times the county average; trucks are 6.4% of it, below the county-wide 20.9%.

4Main StreetSecondary road · 6,152vehicles329trucks · 5.3%
Road class
Secondary road
Congestion ratio
14.5%
Median trip time
23.1 min
Drivers’ median age
48.2 yrs
Drivers’ average income
$76,817

Main Street is a local road at heart: the median trip using it lasts 23.1 minutes, against 33.8 for the county.

51100 E RoadSecondary road · 5,581vehicles274trucks · 4.9%
Road class
Secondary road
Congestion ratio
13.3%
Median trip time
25.5 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$75,369

On its busiest stretch, 1100 E Road carries 2.3 times the county average; trucks are 4.9% of it, below the county-wide 20.9%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 57Motorway · #1 by traffic17,427vehicles5,209trucks · 29.9%
2Walnut StreetPrimary road · #2 by traffic8,335vehicles685trucks · 8.2%
3Oak StreetPrimary road · 3,684vehicles658trucks · 17.9%
Road class
Primary road
Congestion ratio
8.3%
Median trip time
30.3 min
Drivers’ median age
52.0 yrs
Drivers’ average income
$71,082

Oak Street carries 52% more than the county average on its busiest stretch, where the median trip lasts 30.3 minutes.

4Lafayette StreetPrimary road · 5,128vehicles473trucks · 9.2%
Road class
Primary road
Congestion ratio
12.2%
Median trip time
32.9 min
Drivers’ median age
51.6 yrs
Drivers’ average income
$56,395

Lafayette Street peaks at 5,128 vehicles a day, 2.1 times the county average; trucks are 9.2% of it, below the county-wide 20.9%.

5Crescent StreetPrimary road · #3 by traffic6,779vehicles432trucks · 6.4%
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

IroquoisDepartment 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 Iroquois County

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

Need segment-level traffic data?

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