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Traffic heat map of Will County, Illinois: 1,404 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Adlai Stevenson Expressway

Will County, Illinois Traffic Counts

Traffic analytics for Will County, Illinois, calculated from real-world mobile and sensor networks on 30,617 road segments (1,404 road miles, about 242 ft each). It ranks among the top 5 counties in Illinois for average daily traffic. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in Will County, Illinois

Traffic

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

vehicles per day9,536
Trucks

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

10.2%
Average travel time

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

32.1 min
Congestion ratio

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

22.8%
Drivers’ average age

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

45.4 yrs
Drivers’ average income

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

$116,895

Our data shows 9,536 vehicles per day on the average road in Will County, Illinois, and 14,714,640 vehicle-miles traveled per day (≈5.4 billion per year) across its 1,404 miles of monitored roads. Trucks are 10.2% of traffic, close to the 10.2% across Illinois.

Busier roads than 96% of counties in Illinois

Will's average daily traffic volume is 12% higher than the state average - 9,536 vehicles per day against 8,480 - a critical factor for logistics and site planning. In total volume terms, its road network carries about 6.2% of Illinois's statewide total of vehicle-miles. Will carries more traffic than 96% of counties in Illinois.

Journey times run 6% lower than the state level, at 32.1 minutes on average. 76% of counties in Illinois have a longer average travel time than Will's 32.1 minutes.

Congestion is somewhat higher than the state level, at a ratio of 22.8% (10% higher) - relevant for traffic control and delivery planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Will County, Illinois

Trafficvehicles per day25,001
Trucks19.3%
Average travel time43.4 min
Congestion ratio48.6%
Drivers’ average age46.2 yrs
Drivers’ average income$109,534

A significant share of driving in Will County, Illinois, 35% of vehicle-miles, happens on highways. The average highway carries 25,001 vehicles per day, 169% more than the average non-highway road in the same area, which carries 9,283 vehicles per day.

Highways make up 14% of the monitored road miles (204 miles, 494 segments), so they carry more than their share: 5,163,081 vehicle-miles traveled per day (≈1.9 billion per year).

By highway travel volume, that ranks Will in the top 3 counties in Illinois.

More highway trucks than 99% of counties in Illinois

The concentration of trucks on highways (19.3%) is 11% higher than the state average for similar road classifications. The highway traffic mix is typical for Illinois: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 53% of counties in Illinois. By raw truck volume, Will carries more highway trucks than 99% of counties in Illinois.

non-highway traffic icon

Non-highway Traffic in Will County, Illinois

Trafficvehicles per day9,283
Trucks5.3%
Average travel time31.9 min
Congestion ratio22.3%
Drivers’ average age45.2 yrs
Drivers’ average income$119,546

Local roads carry more than half of all travel in Will County, Illinois (65% of vehicle-miles). On the average non-highway road, that comes to 9,283 vehicles per day.

Local roads make up 86% of the monitored road miles (1,201 miles in 30,123 segments) but carry less than their share of travel: 9,551,559 vehicle-miles traveled per day (≈3.5 billion per year). About 1 in 19 vehicles on non-highway roads is a truck (5.3%).

Drivers from higher-income areas than 97% of counties in Illinois

Non-highway roads carry a truck concentration that's 72% lower than the highway network.

Non-highway congestion (22.3%) runs slightly higher than the state level (8% higher).

Trip origins here have higher average income than 97% of counties in Illinois. Will's median driver age is lower than 93% of counties in Illinois.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 69% 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:
April–June is the high season, with volumes +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -12% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Will County, Illinois, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +4% in high season.

Will County vs. Illinois Traffic Comparison

Will County stays close to the Illinois average; the largest gap is its average daily traffic per road, 12% above.

MetricWill CountyIllinois averageDifference
Traffic9,5368,480+12.5%
Truck % (Total Traffic)10.2%10.2%+0.6%
Truck % (Highway)19.3%17.3%+11.4%
Avg. Travel Time32.1 min34.1 min-6.0%

How Will County compares

Will County against nearby counties

Will County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the third busiest roads of the five. The same kind of road, just less of it: traffic per road matches the areas around it while the network itself is smaller.

Will 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
Will County9,53610.2%14,714,64032.1 min22.8%
Kankakee County, Illinois5,19413.0%2,240,81634.3 min13.4%
Cook County, Illinois14,1197.1%63,800,26835.4 min30.7%
Lake County, Indiana9,03110.7%10,261,24434.8 min18.8%
DuPage County, Illinois15,2716.7%17,222,15333.2 min27.4%
Illinois average8,48010.2%N/A34.1 min20.6%

Will County ranked within Illinois

On highway travel volume and highway truck volume, Will County is among the three highest county-level areas in Illinois.

Will County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureWill CountyIllinois rank
Traffic volume (AADT)9,536#5 of 102
Highway vehicle-miles per day5,163,081#3 of 82
Truck share on highways19.3%#44 of 82
Highway trucks per day4,825#2 of 82
Average travel time32.1 min#78 of 102
Average driver income$116,895#4 of 102
Average driver age45.4 yrs#95 of 102

The two ends of this table sit far apart: #2 of 82 on highway truck volume, against #95 of 102 on average driver age.

Busiest roads in Will County, Illinois

Traffic concentrates on a few corridors: the three busiest roads average 79,157 vehicles a day, against 9,536 on the average road in Will County.

Adlai Stevenson Expressway leads with 113,281 vehicles a day, 13,655 of them trucks (12.1%). That is 70% more than the next road, Veterans Memorial Tollway (66,783). It tops the truck ranking too, with the most trucks.

Freight stands out on I 57 and I 80: trucks are 26.9% and 21.9% of the traffic there, against 10.2% county-wide.

I 57 carries longer journeys than most roads here, with a median trip of 49.7 minutes against 32.1 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Adlai Stevenson ExpresswayMotorway · 113,281vehicles13,655trucks · 12.1%
Road class
Motorway
Congestion ratio
86.8%
Median trip time
42.8 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$115,784

Adlai Stevenson Expressway is one of the more congested roads here: trips take 87% longer than at free-flow speed, against 23% county-wide.

2Veterans Memorial TollwayMotorway · 66,783vehicles7,783trucks · 11.7%
Road class
Motorway
Congestion ratio
39.9%
Median trip time
41.8 min
Drivers’ median age
47.1 yrs
Drivers’ average income
$119,449

Veterans Memorial Tollway is a trunk route for the county, carrying 7.0 times the county average on its busiest stretch; trucks are 11.7% of it, above the county-wide 10.2%.

3I 80Motorway · 57,406vehicles12,558trucks · 21.9%
Road class
Motorway
Congestion ratio
56.1%
Median trip time
44.3 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$106,671

I 80 carries through traffic: the median trip using it lasts 44.3 minutes, against 32.1 for the county.

4Des Plaines River Valley BridgeMotorway · 56,064vehicles6,188trucks · 11.0%
Road class
Motorway
Congestion ratio
42.6%
Median trip time
39.8 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$122,905

Des Plaines River Valley Bridge carries 5.9 times the county average at its busiest, 6,188 of them trucks (11.0%, above the county-wide 10.2%).

5La Grange RoadTrunk road · 52,555vehicles3,159trucks · 6.0%
Road class
Trunk road
Congestion ratio
65.6%
Median trip time
36.6 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$123,473

Delays build on La Grange Road: its congestion ratio of 66% over free-flow time is well above the county's 23%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Adlai Stevenson ExpresswayMotorway · #1 by traffic113,281vehicles13,655trucks · 12.1%
2I 80Motorway · #3 by traffic57,406vehicles12,558trucks · 21.9%
3I 57Motorway · 37,137vehicles10,008trucks · 26.9%
Road class
Motorway
Congestion ratio
42.3%
Median trip time
49.7 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$93,108

On its busiest stretch, I 57 carries 3.9 times the county average; trucks are 26.9% of it, above the county-wide 10.2%.

4I 55Motorway · 51,602vehicles9,629trucks · 18.7%
Road class
Motorway
Congestion ratio
44.7%
Median trip time
43.4 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$108,745

I 55 leans on freight: 9,629 trucks a day, 18.7% of its traffic against 10.2% county-wide.

5Veterans Memorial TollwayMotorway · #2 by traffic66,783vehicles7,783trucks · 11.7%
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

WillDepartment 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 Will County

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

Need segment-level traffic data?

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