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Traffic heat map of Jersey County, Illinois: 142 miles of roads shaded from blue (light) to red (heavy traffic), busiest on State Street and US 67

Jersey County, Illinois Traffic Counts

Traffic analytics for Jersey County, Illinois, calculated from real-world mobile and sensor networks on 2,043 road segments (142 road miles, about 367 ft each). Its busiest road, State Street, carries 12,957 vehicles a day, 3.4 times the average road. 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 Jersey County, Illinois

Traffic

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

vehicles per day3,778
Trucks

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

9.3%
Average travel time

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

31.4 min
Congestion ratio

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

10.7%
Drivers’ average age

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

51.1 yrs
Drivers’ average income

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

$80,631

The average monitored road in Jersey County, Illinois carries 3,778 vehicles per day. Across its 142 miles of monitored roads, that adds up to 403,938 vehicle-miles traveled per day (≈147 million per year). Trucks are 9.3% of traffic, close to the 10.2% across Illinois.

Shorter trips than 87% of counties in Illinois

Jersey's average daily traffic volume is 55% lower than the state average - 3,778 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. Across the whole network, that travel is about 0.2% of Illinois's statewide total. By volume, Jersey's 3,778 vehicles per day outpaces 69% of counties in Illinois.

At 31.4 minutes, the average travel time is 8% lower than the state level. On travel time, Jersey runs shorter than 87% of counties in Illinois.

The congestion ratio of 10.7% is 48% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Jersey County, Illinois

Trafficvehicles per day10,218
Trucks11.1%
Average travel time31.4 min
Congestion ratio24.5%
Drivers’ average age51.0 yrs
Drivers’ average income$77,519

A significant share of driving in Jersey County, Illinois, 33% of vehicle-miles, happens on highways. The average highway carries 10,218 vehicles per day, 289% more than the average non-highway road in the same area, which carries 2,626 vehicles per day.

Highways make up 14% of the monitored road miles (19 miles, 310 segments), so they carry more than their share: 132,590 vehicle-miles traveled per day (≈48.4 million per year).

Lower highway truck share than 90% of counties in Illinois

The concentration of trucks on highways (11.1%) is 36% 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.

90% of counties in Illinois see a higher highway truck share than Jersey's 11.1%. 78% of counties in Illinois see more highway trucks per day than Jersey's roughly 1,131.

non-highway traffic icon

Non-highway Traffic in Jersey County, Illinois

Trafficvehicles per day2,626
Trucks8.5%
Average travel time31.4 min
Congestion ratio8.3%
Drivers’ average age51.2 yrs
Drivers’ average income$82,707

Local roads carry more than half of all travel in Jersey County, Illinois (67% of vehicle-miles). The average non-highway road carries 2,626 vehicles per day.

Local roads make up 86% of the monitored road miles (123 miles in 1,733 segments) but carry less than their share of travel: 271,349 vehicle-miles traveled per day (≈99.0 million per year). Trucks make up 8.5% of non-highway traffic, about 1 in 12 vehicles.

Local congestion 60% below the Illinois average

The concentration of trucks on non-highway roads is 23% lower than on highways.

At 60% lower than the state level, the non-highway congestion ratio of 8.3% signals easier movement on local roads.

Trip origins here have higher average income than 75% of counties in Illinois. 78% of counties in Illinois have a younger driver population than Jersey.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 72% higher than the daily average.
Weekend traffic:
Weekends are busier than weekdays: volumes run about 47% above weekday levels, which usually points to leisure, tourism or shopping traffic.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +14% versus the annual average.
Lowest month:
January is the quietest month, with volumes -23% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Jersey County, Illinois, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +14% in high season.

Jersey County vs. Illinois Traffic Comparison

Of the four measures, average daily traffic per road differs most: Jersey County runs 55% below the Illinois average. Its highway truck share is also 36% below.

MetricJersey CountyIllinois averageDifference
Traffic3,7788,480-55.4%
Truck % (Total Traffic)9.3%10.2%-8.3%
Truck % (Highway)11.1%17.3%-36.1%
Avg. Travel Time31.4 min34.1 min-8.1%

How Jersey County compares

Jersey County against nearby counties and cities

Compared with its 4 closest neighbours, Jersey County moves 28.4% of the total daily travel; it has the second 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.

Jersey 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
Jersey County3,7789.3%403,93831.4 min10.7%
Calhoun County, Illinois7787.9%72,34830.4 min4.5%
Greene County, Illinois2,31811.4%229,16835.1 min7.4%
Macoupin County, Illinois2,80112.5%988,57732.1 min8.1%
St. Louis City, Missouri9,8257.9%4,407,53934.9 min29.0%
Illinois average8,48010.2%N/A34.1 min20.6%

Jersey County ranked within Illinois

Jersey County sits in the bottom quarter of the Illinois field on truck share on highways, at #74 of 82.

Jersey County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureJersey CountyIllinois rank
Traffic volume (AADT)3,778#32 of 102
Highway vehicle-miles per day132,590#71 of 82
Truck share on highways11.1%#74 of 82
Highway trucks per day1,131#64 of 82
Average travel time31.4 min#89 of 102
Average driver income$80,631#26 of 102
Average driver age51.1 yrs#23 of 102

The two ends of this table sit far apart: #23 of 102 on average driver age, against #74 of 82 on truck share on highways.

Busiest roads in Jersey County, Illinois

Traffic concentrates on a few corridors: the three busiest roads average 10,425 vehicles a day, against 3,778 on the average road in Jersey County.

State Street leads with 12,957 vehicles a day, 1,284 of them trucks (9.9%). It tops the truck ranking too, with the most trucks.

Trips using Godfrey Road are long: a median of 41.1 minutes against 31.4 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1State StreetTrunk road · 12,957vehicles1,284trucks · 9.9%
Road class
Trunk road
Congestion ratio
33.2%
Median trip time
29.9 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$77,310

Delays build on State Street: its congestion ratio of 33% over free-flow time is well above the county's 11%.

2US 67Trunk road · 9,705vehicles1,096trucks · 11.3%
Road class
Trunk road
Congestion ratio
22.0%
Median trip time
35.4 min
Drivers’ median age
50.6 yrs
Drivers’ average income
$80,091

Travel on US 67's busiest stretch runs 22% over free-flow time, against 11% across the county, so expect slower peak hours.

3Old US 67Tertiary road · 8,615vehicles756trucks · 8.8%
Road class
Tertiary road
Congestion ratio
20.5%
Median trip time
37.7 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$81,093

At 2.3 times the county average, Old US 67 draws drivers from neighborhoods averaging $81,093 in household income.

4South MaplePrimary road · 8,130vehicles589trucks · 7.2%
Road class
Primary road
Congestion ratio
19.4%
Median trip time
29.7 min
Drivers’ median age
50.5 yrs
Drivers’ average income
$86,260

The busiest stretch of South Maple carries 2.2 times the county average; trucks are 7.2% of it, below the county-wide 9.3%.

5Godfrey RoadTrunk road · 7,869vehicles763trucks · 9.7%
Road class
Trunk road
Congestion ratio
11.2%
Median trip time
41.1 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$80,903

On its busiest stretch, Godfrey Road carries 2.1 times the county average; trucks are 9.7% of it, in line with the county-wide 9.3%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1State StreetTrunk road · #1 by traffic12,957vehicles1,284trucks · 9.9%
2US 67Trunk road · #2 by traffic9,705vehicles1,096trucks · 11.3%
3Godfrey RoadTrunk road · #5 by traffic7,869vehicles763trucks · 9.7%
4Old US 67Tertiary road · #3 by traffic8,615vehicles756trucks · 8.8%
5South MaplePrimary road · #4 by traffic8,130vehicles589trucks · 7.2%
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

JerseyDepartment 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 Jersey County

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

Need segment-level traffic data?

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