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Traffic heat map of Hamilton County, Illinois: 75 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Randolph Street and Market Street

Hamilton County, Illinois Traffic Counts

The average road here carries 2,316 vehicles a day, 73% less than the Illinois average of 8,480. This page breaks down traffic in Hamilton County, Illinois across 75 miles of monitored roads split into 728 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 Hamilton County, Illinois

Traffic

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

vehicles per day2,316
Trucks

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

8.5%
Average travel time

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

33.7 min
Congestion ratio

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

6.8%
Drivers’ average age

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

50.8 yrs
Drivers’ average income

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

$70,157

The average monitored road in Hamilton County, Illinois carries 2,316 vehicles per day. Across its 75 miles of monitored roads, that adds up to 151,296 vehicle-miles traveled per day (≈55.2 million per year). About 1 in 12 vehicles is a truck, fewer than the 1 in 10 across Illinois.

Traffic 73% below the Illinois average

Hamilton sees 73% lower average daily traffic volume than the state average (2,316 vehicles per day against 8,480), suggesting less demand on each road - quiet roads that suit freight movement more than drive-by retail. Network-wide, Hamilton accounts for less than 0.1% of Illinois's statewide total of vehicle-miles. 72% of counties in Illinois see more traffic than Hamilton's 2,316 vehicles per day.

Journey times here (33.7 minutes on average) closely track the state level. 50% of counties in Illinois have a shorter average travel time than Hamilton's 33.7 minutes.

Congestion runs 67% lower than the state level, at a ratio of 6.8%, which means smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Hamilton County vs. Illinois Traffic Comparison

Hamilton County's biggest difference from the Illinois average is its average daily traffic per road, 73% below it. Its truck share is also 16% below.

MetricHamilton CountyIllinois averageDifference
Traffic2,3168,480-72.7%
Truck % (Total Traffic)8.5%10.2%-16.4%
Avg. Travel Time33.7 min34.1 min-1.2%

How Hamilton County compares

Hamilton County against nearby counties

Compared with its 4 closest neighbours, Hamilton County moves 26.5% of the total daily travel; it has the fourth busiest roads of the five.

Hamilton 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
Hamilton County2,3168.5%151,29633.7 min6.8%
Saline County, Illinois3,2257.6%503,00033.6 min8.4%
White County, Illinois2,78915.9%472,17236.7 min8.1%
Franklin County, Illinois3,54616.2%1,158,25633.3 min10.5%
Gallatin County, Illinois1,58911.4%151,65839.1 min5.1%
Illinois average8,48010.2%N/A34.1 min20.6%

Hamilton County ranked within Illinois

Hamilton County ranked among 102 county-level areas in Illinois (1 = highest).
MeasureHamilton CountyIllinois rank
Traffic volume (AADT)2,316#74 of 102
Average travel time33.7 min#52 of 102
Average driver income$70,157#58 of 102
Average driver age50.8 yrs#27 of 102

Busiest roads in Hamilton County, Illinois

Traffic concentrates on a few corridors: the three busiest roads average 4,353 vehicles a day, against 2,316 on the average road in Hamilton County.

Randolph Street leads with 5,170 vehicles a day, 267 of them trucks (5.2%). Market Street carries the most trucks, 314 a day (7.1% of its traffic), although it ranks #2 for all traffic.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Randolph StreetSecondary road · 5,170vehicles267trucks · 5.2%
Road class
Secondary road
Congestion ratio
12.5%
Median trip time
29.7 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$66,593

On its busiest stretch, Randolph Street carries 2.2 times the county average; trucks are 5.2% of it, below the county-wide 8.5%.

2Market StreetPrimary road · 4,443vehicles314trucks · 7.1%
Road class
Primary road
Congestion ratio
10.9%
Median trip time
32.6 min
Drivers’ median age
51.8 yrs
Drivers’ average income
$65,522

Market Street carries 92% more than the county average at its busiest, 314 of them trucks (7.1%, below the county-wide 8.5%).

3Jackson StreetPrimary road · 3,445vehicles232trucks · 6.8%
Road class
Primary road
Congestion ratio
8.2%
Median trip time
33.8 min
Drivers’ median age
50.5 yrs
Drivers’ average income
$71,360

Jackson Street carries 49% more than the county average on its busiest stretch, where the median trip lasts 33.8 minutes.

4IL 142Primary road · 3,169vehicles272trucks · 8.6%
Road class
Primary road
Congestion ratio
7.7%
Median trip time
34.8 min
Drivers’ median age
51.8 yrs
Drivers’ average income
$65,713

At 37% more than the county average, IL 142 draws drivers from neighborhoods averaging $65,713 in household income.

5Washington StreetPrimary road · 3,075vehicles201trucks · 6.5%
Road class
Primary road
Congestion ratio
11.4%
Median trip time
37.6 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$65,840

Washington Street is busy by local standards, at 33% more than the county average on its busiest stretch; trucks are 6.5% of it, below the county-wide 8.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Market StreetPrimary road · #2 by traffic4,443vehicles314trucks · 7.1%
2County Road 6Primary road · 2,819vehicles290trucks · 10.3%
Road class
Primary road
Congestion ratio
6.7%
Median trip time
39.4 min
Drivers’ median age
50.9 yrs
Drivers’ average income
$66,500

County Road 6 peaks at 2,819 vehicles a day, 22% more than the county average; trucks are 10.3% of it, above the county-wide 8.5%.

3County Road 1165Primary road · 2,830vehicles272trucks · 9.6%
Road class
Primary road
Congestion ratio
6.9%
Median trip time
35.9 min
Drivers’ median age
51.3 yrs
Drivers’ average income
$76,730

County Road 1165 carries 22% more than the county average at its busiest, 272 of them trucks (9.6%, above the county-wide 8.5%).

4IL 142Primary road · #4 by traffic3,169vehicles272trucks · 8.6%
5Randolph StreetSecondary road · #1 by traffic5,170vehicles267trucks · 5.2%
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

HamiltonDepartment 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 Hamilton County

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

Need segment-level traffic data?

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