This page delivers traffic analytics for Williamson County, Illinois. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Williamson County, Illinois among 338 road miles divided in 5,473 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 326 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.
4,508
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
12.7%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.1 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.
12.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.3 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$69,000
Our data indicates an estimated average traffic volume of 4,508 vehicles per day in Williamson County, Illinois that results in 2,115,226 vehicle-miles traveled per day (≈772 million per year). The traffic stream is comprised of an average of 1 truck for every 8 vehicles. Typical time spent behind the wheel per trip is 33.1 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Illinois state averages: Williamson sees 47% lower average daily traffic volume than the state average (4,508 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 2,115,226 vehicle-miles traveled per day (≈772 million per year), roughly 0.9% of Illinois's statewide total. At 33.1 minutes, the average travel time is 3% lower than the state level. The congestion ratio of 12.0% is 42% lower, pointing to smoother traffic flow than the state level - crucial for traffic control improvement and logistics planning. 75% of counties in Illinois see less traffic than Williamson's 4,508 vehicles per day. On travel time, Williamson runs longer than 38% 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.
13,775
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
17.7%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
38.2 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.
24.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.1 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$67,935
A significant volume of traffic in Williamson County, Illinois utilizes the highway network. The average highway carries 13,775 vehicles per day, 248% more than the average non-highway road in the same area, which carries 3,953 vehicles per day. That average covers 95 highway road miles divided in 309 segments (average segment length 1,629 ft), together carrying 1,286,378 vehicle-miles traveled per day (≈470 million per year). That is more highway travel volume than 80% of counties in Illinois. Trucks constitute 17.7% of highway traffic.
Analytical insight
At 17.7%, highway truck share is 2% higher than the state average, marking Williamson as a significant freight corridor - underscoring the importance of highway access for logistics operators. By truck concentration, highways here outrank 41% of counties in Illinois. 58% of counties in Illinois see fewer highway trucks per day than Williamson's roughly 2,434.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
3,953
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.9%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
32.8 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.
11.3%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$69,846
The non-highway road network in Williamson County, Illinois supports a substantial volume of traffic. The average non-highway road carries 3,953 vehicles per day, 71% less than the average highway in the same area, which carries 13,775 vehicles per day. That average covers 242 non-highway road miles divided in 5,164 segments (average segment length 248 ft), together carrying 828,848 vehicle-miles traveled per day (≈303 million per year). Trucks constitute 4.9% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 72% fewer trucks by share. The non-highway congestion ratio of 11.3% is 45% lower than the state level, suggesting more efficient local mobility than the state average. Williamson's overall average travel time exceeds 38% of counties in Illinois. Williamson's average driver income exceeds 40% of counties in Illinois. Williamson's median driver age is higher than 32% of counties in Illinois.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 3:00 PM–7:00 PM, with volumes reaching approximately 71% higher than the daily average.
Weekend traffic:
Weekend volumes run about 14% below weekday levels.
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average.
Analytical insight
In Williamson County, Illinois, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +4% in high season.
Traffic Flow Profile Comparison
Metric
Williamson
Illinois
Average
Difference
Traffic
4,508
8,480
-46.8%
Truck % (Total Traffic)
12.7%
10.2%
+24.5%
Truck % (Highway)
17.7%
17.3%
+2.0%
Avg. Travel Time
33.1 min
34.1 min
-2.9%
Frequently Asked Questions
The average daily traffic volume is calculated at 4,508 vehicles per day, providing a baseline for daily operations and site assessment.
The driver population in Williamson skews older than 32% of counties in Illinois.
Drivers on Williamson roads have a median age of 48 years, and the median household income of the neighborhoods trips originate from averages $69,000 - useful context for retail siting and customer profiling.
The average travel time for drivers is 33.1 minutes, offering a standard metric for commute and delivery route planning.
Trucks account for approximately 12.7% of the total traffic mix across all road types, with a significantly higher concentration of 17.7% on highways.
Approximately 30% of highway traffic and 12% of non-highway traffic consists of vehicles whose trip originates outside Williamson 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.
Weekday peaks occur between 7:00 AM and 8:00 AM in the morning and between 3:00 PM and 7:00 PM in the evening - about 71% above the daily average.
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)
