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Traffic heat map of Adams County, Illinois: 432 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Broadway Street and 24th Street

Adams County, Illinois Traffic Counts

Its busiest road, Broadway Street, carries 22,618 vehicles a day, 5.2 times the average road. This page breaks down traffic in Adams County, Illinois across 432 miles of monitored roads split into 3,913 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Adams County, Illinois

Traffic

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

vehicles per day4,336
Trucks

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

7.4%
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.

12.9%
Drivers’ average age

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

49.6 yrs
Drivers’ average income

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

$70,218

The average monitored road in Adams County, Illinois carries 4,336 vehicles per day. Across its 432 miles of monitored roads, that adds up to 1,164,837 vehicle-miles traveled per day (≈425 million per year). Trucks are a smaller part of the mix than across Illinois: 7.4% against 10.2%.

Traffic 49% below the Illinois average

Adams sees 49% lower average daily traffic volume than the state average (4,336 vehicles per day against 8,480), suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 0.5% of Illinois's statewide total. 74% of counties in Illinois see less traffic than Adams's 4,336 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 50% of counties in Illinois.

Congestion runs 37% lower than the state level, at a ratio of 12.9%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Adams County, Illinois

Trafficvehicles per day3,651
Trucks11.8%
Average travel time34.9 min
Congestion ratio9.1%
Drivers’ average age50.1 yrs
Drivers’ average income$72,168

Highways carry a smaller share of travel in Adams County, Illinois, 26% of vehicle-miles; most driving happens on local roads. The average highway carries 3,651 vehicles per day, 17% less than the average non-highway road in the same area, which carries 4,379 vehicles per day.

Highways make up 20% of the monitored road miles (87 miles, 233 segments), so they carry more than their share: 308,609 vehicle-miles traveled per day (≈113 million per year).

Fewer highway trucks than 94% of counties in Illinois

The concentration of trucks on highways (11.8%) is 32% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

By truck concentration, highways here trail 86% of counties in Illinois. By raw truck volume, Adams carries fewer highway trucks than 94% of counties in Illinois.

non-highway traffic icon

Non-highway Traffic in Adams County, Illinois

Trafficvehicles per day4,379
Trucks5.8%
Average travel time33.7 min
Congestion ratio13.2%
Drivers’ average age49.6 yrs
Drivers’ average income$69,794

Local roads carry most of the traffic in Adams County, Illinois: 74% of all vehicle-miles. On the average non-highway road, that comes to 4,379 vehicles per day.

Their share of road miles is similar, 80% (345 miles in 3,680 segments), carrying 856,228 vehicle-miles traveled per day (≈313 million per year). The truck share on non-highway roads is 5.8%.

Local congestion 36% below the Illinois average

Non-highway roads carry a truck concentration that's 50% lower than the highway network.

At 36% lower than the state level, the non-highway congestion ratio of 13.2% signals easier movement on local roads.

55% of counties in Illinois see higher average driver income among trip origins than Adams. 55% of counties in Illinois have a younger driver population than Adams.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 12:00 PM to 7:00 PM, with volumes reaching approximately 63% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 42% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +4% versus the annual average.
Lowest month:
December is the quietest month, with volumes -10% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Adams 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.

Adams County vs. Illinois Traffic Comparison

Adams County's biggest difference from the Illinois average is its average daily traffic per road, 49% below it. Its highway truck share is also 32% below.

MetricAdams CountyIllinois averageDifference
Traffic4,3368,480-48.9%
Truck % (Total Traffic)7.4%10.2%-27.1%
Truck % (Highway)11.8%17.3%-32.1%
Avg. Travel Time33.8 min34.1 min-1.1%

How Adams County compares

Adams County is more congested than any nearby county

Set against the average of the 4 areas nearest to it, Adams County carries 89.5% more traffic on a typical road and moves 2.3 times the total daily travel; it has the busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Adams 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
Adams County4,3367.4%1,164,83733.8 min12.9%
Brown County, Illinois1,9769.0%125,03133.6 min7.4%
Marion County, Missouri3,8889.6%795,54331.4 minN/A
Pike County, Illinois1,88213.7%733,21034.6 min6.9%
Lewis County, Missouri1,40612.1%345,60733.0 min7.3%
Illinois average8,48010.2%N/A34.1 min20.6%

Adams County ranked within Illinois

Adams County sits in the bottom quarter of the Illinois field on highway truck volume, at #77 of 82.

Adams County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureAdams CountyIllinois rank
Traffic volume (AADT)4,336#27 of 102
Highway vehicle-miles per day308,609#55 of 82
Truck share on highways11.8%#71 of 82
Highway trucks per day429#77 of 82
Average travel time33.8 min#51 of 102
Average driver income$70,218#57 of 102
Average driver age49.6 yrs#46 of 102

Adams County ranks #27 of 102 on average daily traffic volume but #77 of 82 on highway truck volume - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Adams County, Illinois

On their busiest stretches, the three busiest roads in Adams County carry 17,144 vehicles a day on average, 4.0 times the typical road in the county (4,336).

Broadway Street leads with 22,618 vehicles a day, 1,040 of them trucks (4.6%). It also carries the most trucks.

Few trucks use 36th Street: 2.7% of its traffic, under half the county's 7.4%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Broadway StreetPrimary road · 22,618vehicles1,040trucks · 4.6%
Road class
Primary road
Congestion ratio
33.2%
Median trip time
34.3 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$64,377

Broadway Street is one of the more congested roads here: trips take 33% longer than at free-flow speed, against 13% county-wide.

224th StreetSecondary road · 15,497vehicles664trucks · 4.3%
Road class
Secondary road
Congestion ratio
36.4%
Median trip time
32.1 min
Drivers’ median age
49.2 yrs
Drivers’ average income
$66,768

Delays build on 24th Street: its congestion ratio of 36% over free-flow time is well above the county's 13%.

336th StreetTertiary road · 13,316vehicles358trucks · 2.7%
Road class
Tertiary road
Congestion ratio
31.1%
Median trip time
29.0 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$74,754

On its busiest stretch, 36th Street carries 3.1 times the county average; trucks are 2.7% of it, below the county-wide 7.4%.

4State StreetSecondary road · 12,491vehicles409trucks · 3.3%
Road class
Secondary road
Congestion ratio
28.8%
Median trip time
31.5 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$68,853

State Street peaks at 12,491 vehicles a day, 2.9 times the county average; trucks are 3.3% of it, below the county-wide 7.4%.

5Chicago-Kansas City ExpresswayMotorway · 8,469vehicles1,013trucks · 12.0%
Road class
Motorway
Congestion ratio
7.9%
Median trip time
36.3 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$73,762

Chicago-Kansas City Expressway carries 2.0 times the county average at its busiest, 1,013 of them trucks (12.0%, above the county-wide 7.4%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1Broadway StreetPrimary road · #1 by traffic22,618vehicles1,040trucks · 4.6%
2Chicago-Kansas City ExpresswayMotorway · #5 by traffic8,469vehicles1,013trucks · 12.0%
3US 24Trunk road · 6,712vehicles792trucks · 11.8%
Road class
Trunk road
Congestion ratio
8.2%
Median trip time
30.5 min
Drivers’ median age
50.3 yrs
Drivers’ average income
$72,366

US 24 carries 55% more than the county average on its busiest stretch, where the median trip lasts 30.5 minutes.

424th StreetSecondary road · #2 by traffic15,497vehicles664trucks · 4.3%
5IL 110Motorway · 5,046vehicles603trucks · 11.9%
Road class
Motorway
Congestion ratio
22.9%
Median trip time
38.5 min
Drivers’ median age
50.6 yrs
Drivers’ average income
$73,760

At 16% more than the county average, IL 110 draws drivers from neighborhoods averaging $73,760 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

AdamsDepartment 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 Adams County

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

Need segment-level traffic data?

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