This page delivers traffic analytics for Grundy County, Illinois. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Grundy County, Illinois among 316 road miles divided in 4,232 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 394 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.
4,612
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
17.5%
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.
13.4%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.4 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$95,799
Our data indicates an estimated average traffic volume of 4,612 vehicles per day in Grundy County, Illinois that results in 1,727,828 vehicle-miles traveled per day (≈631 million per year). The traffic stream is comprised of an average of 1 truck for every 6 vehicles. Typical time spent behind the wheel per trip is 30.8 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Illinois state averages: Grundy sees 46% lower average daily traffic volume than the state average (4,612 vehicles per day against 8,480), suggesting less demand on each road - a critical factor for logistics and site planning. Network-wide, Grundy accounts for about 0.7% of Illinois's statewide total, at 1,727,828 vehicle-miles traveled per day (≈631 million per year). The average trip takes 30.8 minutes, 10% lower than the state level. Congestion runs 35% lower than the state level, at a ratio of 13.4% - smoother traffic flow - crucial for traffic control improvement and logistics planning. 76% of counties in Illinois see less traffic than Grundy's 4,612 vehicles per day. Its average travel time of 30.8 minutes is longer than 9% 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.
10,070
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
25.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
52.5 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.
18.8%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.0 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$95,974
A significant volume of traffic in Grundy County, Illinois utilizes the highway network. The average highway carries 10,070 vehicles per day, 132% more than the average non-highway road in the same area, which carries 4,335 vehicles per day. That average covers 83 highway road miles divided in 204 segments (average segment length 2,140 ft), together carrying 1,029,129 vehicle-miles traveled per day (≈376 million per year). That is more highway travel volume than 77% of counties in Illinois. Trucks constitute 25.0% of highway traffic.
Analytical insight
At 25.0%, highway truck share is 44% higher than the state average, marking Grundy as a significant freight corridor - underscoring the importance of highway access for logistics operators. 67% of counties in Illinois see a lower highway truck share than Grundy's 25.0%. Grundy's highway truck count is higher than 78% of counties in Illinois, at roughly 2,515 trucks per day.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
4,335
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
29.7 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.
13.1%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$95,735
The non-highway road network in Grundy County, Illinois supports a substantial volume of traffic. The average non-highway road carries 4,335 vehicles per day, 57% less than the average highway in the same area, which carries 10,070 vehicles per day. That average covers 233 non-highway road miles divided in 4,028 segments (average segment length 306 ft), together carrying 698,699 vehicle-miles traveled per day (≈255 million per year). Trucks constitute 6.5% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 74% lower than on highways. At 36% lower than the state level, the non-highway congestion ratio of 13.1% signals easier movement on local roads. Grundy's overall average travel time exceeds 9% of counties in Illinois. 91% of counties in Illinois see lower average driver income among trip origins than Grundy. The driver population here skews older than 12% of counties in Illinois.
Time-of-Day & Seasonal Patterns
Analytical insight
In Grundy County, Illinois, the peak hour concentrates about 7% of the day's traffic.
Traffic Flow Profile Comparison
Metric
Grundy
Illinois
Average
Difference
Traffic
4,612
8,480
-45.6%
Truck % (Total Traffic)
17.5%
10.2%
+71.8%
Truck % (Highway)
25.0%
17.3%
+44.1%
Avg. Travel Time
30.8 min
34.1 min
-9.7%
Frequently Asked Questions
The average daily traffic volume is calculated at 4,612 vehicles per day, providing a baseline for daily operations and site assessment.
The driver population in Grundy skews older than 12% of counties in Illinois.
The average travel time for drivers is 30.8 minutes, offering a standard metric for commute and delivery route planning.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 3:00 PM and 7:00 PM in the evening - about 73% above the daily average.
Trucks account for approximately 17.5% of the total traffic mix across all road types, with a significantly higher concentration of 25.0% on highways.
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)
