This page delivers traffic analytics for Johnson County, Illinois. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Johnson County, Illinois among 181 road miles divided in 1,394 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 685 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
2,074
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
22.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.6 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
7.6%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
49.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$66,248
Our data indicates an estimated average traffic volume of 2,074 vehicles per day in Johnson County, Illinois that results in 633,704 vehicle-miles traveled per day (≈231 million per year). The traffic stream is comprised of an average of 1 truck for every 5 vehicles. Typical time spent behind the wheel per trip is 33.6 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Illinois state averages: Johnson sees 76% lower average daily traffic volume than the state average (2,074 vehicles per day against 8,480), suggesting less demand on each road - a critical factor for logistics and site planning. Across the whole network that adds up to 633,704 vehicle-miles traveled per day (≈231 million per year), roughly 0.3% of Illinois's statewide total. Journey times run 2% lower than the state level, at 33.6 minutes on average. At 63% lower than the state level, the 7.6% congestion ratio signals smoother traffic flow - crucial for traffic control improvement and logistics planning. Johnson carries more traffic than 17% of counties in Illinois. Its average travel time of 33.6 minutes is longer than 45% of counties in Illinois.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
3,638
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
27.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
51.7 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
8.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
50.0 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$68,645
A significant volume of traffic in Johnson County, Illinois utilizes the highway network. The average highway carries 3,638 vehicles per day, 99% more than the average non-highway road in the same area, which carries 1,829 vehicles per day. That average covers 72 highway road miles divided in 189 segments (average segment length 2,008 ft), together carrying 463,074 vehicle-miles traveled per day (≈169 million per year). Trucks constitute 27.5% of highway traffic.
Analytical insight
Highway truck concentration here runs 58% higher than the state average, at 27.5% - positioning Johnson as a significant freight corridor. For logistics operators, this validates the importance of highway access. 83% of counties in Illinois see a lower highway truck share than Johnson's 27.5%. 43% of counties in Illinois see fewer highway trucks per day than Johnson's roughly 999.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
1,829
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.7%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
30.8 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
7.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
49.8 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$64,139
The non-highway road network in Johnson County, Illinois supports a substantial volume of traffic. The average non-highway road carries 1,829 vehicles per day, 50% less than the average highway in the same area, which carries 3,638 vehicles per day. That average covers 109 non-highway road miles divided in 1,205 segments (average segment length 478 ft), together carrying 170,630 vehicle-miles traveled per day (≈62.3 million per year). Trucks constitute 7.7% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 72% fewer trucks by share. The non-highway congestion ratio of 7.5% is 64% lower than the state level, suggesting more efficient local mobility than the state average. Overall, average travel time here is longer than 45% of counties in Illinois. 29% of counties in Illinois see lower average driver income among trip origins than Johnson. The driver population here skews older than 61% of counties in Illinois.
Time-of-Day & Seasonal Patterns
Analytical insight
In Johnson County, Illinois, the peak hour concentrates about 7% of the day's traffic.
Traffic Flow Profile Comparison
Metric
Johnson
Illinois
Average
Difference
Traffic
2,074
8,480
-75.5%
Truck % (Total Traffic)
22.1%
10.2%
+117.5%
Truck % (Highway)
27.5%
17.3%
+58.5%
Avg. Travel Time
33.6 min
34.1 min
-1.5%
Frequently Asked Questions
The average daily traffic volume is calculated at 2,074 vehicles per day, providing a baseline for daily operations and site assessment.
Johnson's highway truck share of 27.5% is higher than 83% of counties in Illinois.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 2:00 PM and 7:00 PM in the evening - about 65% above the daily average.
The average travel time for drivers is 33.6 minutes, offering a standard metric for commute and delivery route planning.
Approximately 44% of highway traffic and 18% of non-highway traffic consists of vehicles whose trip originates outside Johnson County, Illinois. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
Trucks account for approximately 22.1% of the total traffic mix across all road types, with a significantly higher concentration of 27.5% on highways.
Drivers on Johnson roads have a median age of 50 years, and the median household income of the neighborhoods trips originate from averages $66,248 - useful context for retail siting and customer profiling.
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)
