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Traffic heat map of Boone County, Illinois: 314 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Jane Addams Memorial Tollway

Boone County, Illinois Traffic Counts

Traffic analytics for Boone County, Illinois, calculated from real-world mobile and sensor networks on 4,581 road segments (314 road miles, about 362 ft each). Its highways rank among the top 3 counties in Illinois for trucks per day. 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 Volume & Performance in Boone County, Illinois

Traffic

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

vehicles per day3,850
Trucks

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

13.3%
Average travel time

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

31.2 min
Congestion ratio

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

12.0%
Drivers’ average age

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

48.2 yrs
Drivers’ average income

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

$93,545

The average monitored road in Boone County, Illinois carries 3,850 vehicles per day. Across its 314 miles of monitored roads, that adds up to 1,616,463 vehicle-miles traveled per day (≈590 million per year). At 13.3%, the truck share runs above the 10.2% across Illinois: about 1 in 7 vehicles.

Shorter trips than 88% of counties in Illinois

At 3,850 vehicles per day, the average monitored road in Boone carries 55% less traffic than the state average of 8,480, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 0.7% of Illinois's statewide total. Boone carries more traffic than 70% of counties in Illinois.

At 31.2 minutes, the average travel time is 8% lower than the state level. Its average travel time of 31.2 minutes is shorter than 88% of counties in Illinois.

At 42% lower than the state level, the 12.0% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Boone County, Illinois

Trafficvehicles per day18,353
Trucks22.4%
Average travel time53.7 min
Congestion ratio27.8%
Drivers’ average age49.3 yrs
Drivers’ average income$93,215

A significant share of driving in Boone County, Illinois, 43% of vehicle-miles, happens on highways. The average highway carries 18,353 vehicles per day, 388% more than the average non-highway road in the same area, which carries 3,761 vehicles per day.

That comes from just 11% of the monitored road miles: 33 miles in 28 segments, carrying 696,120 vehicle-miles traveled per day (≈254 million per year).

By highway travel volume, Boone outranks 62% of counties in Illinois.

More highway trucks than 98% of counties in Illinois

The concentration of trucks on highways (22.4%) is 29% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

Boone's highway truck share (22.4%) is higher than 62% of counties in Illinois. 98% of counties in Illinois see fewer highway trucks per day than Boone's roughly 4,113.

non-highway traffic icon

Non-highway Traffic in Boone County, Illinois

Trafficvehicles per day3,761
Trucks6.5%
Average travel time31.1 min
Congestion ratio11.9%
Drivers’ average age48.1 yrs
Drivers’ average income$93,637

A little more than half of the driving in Boone County, Illinois happens on local roads: 57% of all vehicle-miles. A typical local road sees 3,761 vehicles per day.

Local roads make up 89% of the monitored road miles (281 miles in 4,553 segments) but carry less than their share of travel: 920,343 vehicle-miles traveled per day (≈336 million per year). About 1 in 15 vehicles on non-highway roads is a truck (6.5%).

Drivers from higher-income areas than 90% of counties in Illinois

The concentration of trucks on non-highway roads is 71% lower than on highways.

The non-highway congestion ratio of 11.9% is 43% lower than the state level, suggesting more efficient local mobility than the state average.

Boone's average driver income is higher than 90% of counties in Illinois. Boone's median driver age is lower than 69% of counties in Illinois.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Boone County vs. Illinois Traffic Comparison

Boone County's biggest difference from the Illinois average is its average daily traffic per road, 55% below it. Its truck share, by contrast, is 31% above.

MetricBoone CountyIllinois averageDifference
Traffic3,8508,480-54.6%
Truck % (Total Traffic)13.3%10.2%+31.0%
Truck % (Highway)22.4%17.3%+29.3%
Avg. Travel Time31.2 min34.1 min-8.4%

How Boone County compares

Boone County moves the least traffic of its nearby counties

Against the 4 nearest areas, Boone County moves 38.7% of the total daily travel and is 27.7% less congested; it has the fourth busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Boone 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
Boone County3,85013.3%1,616,46331.2 min12.0%
Winnebago County, Illinois6,4739.7%5,336,85534.9 min19.3%
McHenry County, Illinois9,1886.8%5,331,10434.3 min24.0%
Rock County, Wisconsin4,17312.3%3,531,63834.1 min12.2%
Walworth County, Wisconsin3,3349.6%2,511,83232.4 min10.6%
Illinois average8,48010.2%N/A34.1 min20.6%

Boone County ranked within Illinois

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

Boone County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureBoone CountyIllinois rank
Traffic volume (AADT)3,850#31 of 102
Highway vehicle-miles per day696,120#32 of 82
Truck share on highways22.4%#32 of 82
Highway trucks per day4,113#3 of 82
Average travel time31.2 min#90 of 102
Average driver income$93,545#11 of 102
Average driver age48.2 yrs#71 of 102

The two ends of this table sit far apart: #3 of 82 on highway truck volume, against #90 of 102 on average travel time.

Busiest roads in Boone County, Illinois

Traffic concentrates on a few corridors: the three busiest roads average 24,249 vehicles a day, against 3,850 on the average road in Boone County.

Jane Addams Memorial Tollway leads with 42,099 vehicles a day, 9,433 of them trucks (22.4%). No other road comes close: Belvidere Road, in second place, carries 15,456. It also carries the most trucks.

Jane Addams Memorial Tollway carries longer journeys than most roads here, with a median trip of 53.7 minutes against 31.2 county-wide.

Trucks make up 22.4% of traffic on Jane Addams Memorial Tollway, against 13.3% across all roads in the county.

Belvidere Road is busy with cars rather than freight: only 6.2% of its traffic is trucks, against 13.3% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Jane Addams Memorial TollwayMotorway · 42,099vehicles9,433trucks · 22.4%
Road class
Motorway
Congestion ratio
27.8%
Median trip time
53.7 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$93,215

A main artery: Jane Addams Memorial Tollway's busiest stretch carries 10.9 times the county average; trucks are 22.4% of it, above the county-wide 13.3%.

2Belvidere RoadPrimary road · 15,456vehicles962trucks · 6.2%
Road class
Primary road
Congestion ratio
40.3%
Median trip time
27.6 min
Drivers’ median age
47.4 yrs
Drivers’ average income
$89,288

Travel on Belvidere Road's busiest stretch runs 40% over free-flow time, against 12% across the county, so expect slower peak hours.

3US 20Primary road · 15,191vehicles1,491trucks · 9.8%
Road class
Primary road
Congestion ratio
19.2%
Median trip time
36.7 min
Drivers’ median age
48.7 yrs
Drivers’ average income
$78,443

The busiest stretch of US 20 carries 3.9 times the county average; trucks are 9.8% of it, below the county-wide 13.3%.

4State StreetPrimary road · 14,899vehicles794trucks · 5.3%
Road class
Primary road
Congestion ratio
35.9%
Median trip time
30.5 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$90,297

State Street is one of the more congested roads here: trips take 36% longer than at free-flow speed, against 12% county-wide.

5N State StreetPrimary road · 14,231vehicles890trucks · 6.2%
Road class
Primary road
Congestion ratio
33.1%
Median trip time
28.7 min
Drivers’ median age
49.0 yrs
Drivers’ average income
$87,424

On its busiest stretch, N State Street carries 3.7 times the county average; trucks are 6.2% of it, below the county-wide 13.3%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Jane Addams Memorial TollwayMotorway · #1 by traffic42,099vehicles9,433trucks · 22.4%
2US 20Primary road · #3 by traffic15,191vehicles1,491trucks · 9.8%
3Genoa RoadPrimary road · 12,988vehicles1,263trucks · 9.7%
Road class
Primary road
Congestion ratio
28.2%
Median trip time
29.2 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$89,779

Genoa Road peaks at 12,988 vehicles a day, 3.4 times the county average; trucks are 9.7% of it, below the county-wide 13.3%.

4Belvidere RoadPrimary road · #2 by traffic15,456vehicles962trucks · 6.2%
5Grant HighwayPrimary road · 13,763vehicles929trucks · 6.8%
Road class
Primary road
Congestion ratio
14.3%
Median trip time
37.8 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$83,907

Grant Highway carries 3.6 times the county average at its busiest, 929 of them trucks (6.8%, below the county-wide 13.3%).

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

BooneDepartment 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 Boone County

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

Need segment-level traffic data?

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