This page delivers traffic analytics for Cook County, Illinois. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Cook County, Illinois among 3,934 road miles divided in 156,000 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 133 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.
14,119
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.4 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.
30.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$99,445
Our data indicates an estimated average traffic volume of 14,119 vehicles per day in Cook County, Illinois that results in 63,800,268 vehicle-miles traveled per day (≈23.3 billion per year). The traffic stream is comprised of an average of 1 truck for every 14 vehicles. Typical time spent behind the wheel per trip is 35.4 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Illinois state averages: At 14,119 vehicles per day, the average monitored road in Cook carries 67% more traffic than the state average of 8,480 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 63,800,268 vehicle-miles traveled per day (≈23.3 billion per year), roughly 27% of Illinois's statewide total. At 35.4 minutes, the average travel time is 4% higher than the state level. The congestion ratio of 30.7% is 49% higher, pointing to more pronounced congestion than the state level - crucial for traffic control improvement and logistics planning. By volume, Cook's 14,119 vehicles per day outpaces 99% of counties in Illinois. Its average travel time of 35.4 minutes is longer than 77% 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.
39,126
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
11.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
42.1 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.
54.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
44.8 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$102,136
A significant volume of traffic in Cook County, Illinois utilizes the highway network. The average highway carries 39,126 vehicles per day, 187% more than the average non-highway road in the same area, which carries 13,636 vehicles per day. That average covers 585 highway road miles divided in 2,956 segments (average segment length 1,045 ft), together carrying 24,180,581 vehicle-miles traveled per day (≈8.8 billion per year). That is the most highway travel volume of any county in Illinois. Trucks constitute 11.0% of highway traffic.
Analytical insight
At 11.0%, highway truck share is 36% lower than the state average, marking Cook as a primarily local traffic hub - underscoring the importance of local access for logistics operators. 9% of counties in Illinois see a lower highway truck share than Cook's 11.0%. By raw truck volume, Cook carries more highway trucks than 96% of counties in Illinois.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
13,636
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.6%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.3 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.
30.3%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$98,192
The non-highway road network in Cook County, Illinois supports a substantial volume of traffic. The average non-highway road carries 13,636 vehicles per day, 65% less than the average highway in the same area, which carries 39,126 vehicles per day. That average covers 3,349 non-highway road miles divided in 153,044 segments (average segment length 116 ft), together carrying 39,619,687 vehicle-miles traveled per day (≈14.5 billion per year). Trucks constitute 4.6% of non-highway traffic.
Analytical insight
Non-highway roads carry a truck concentration that's 58% lower than the highway network. At 47% higher than the state level, the non-highway congestion ratio of 30.3% signals more friction on local roads. 77% of counties in Illinois see shorter overall travel times than Cook. Cook's average driver income exceeds 94% of counties in Illinois. The driver population here skews older than 6% of counties in Illinois.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 3:00 PM–7:00 PM, with volumes reaching approximately 55% higher than the daily average.
Weekend traffic:
Weekend volumes run about 16% below weekday levels.
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -8% versus the annual average.
Analytical insight
In Cook County, Illinois, the peak hour concentrates about 6% of the day's traffic, and seasonal swing is mild at +4% in high season.
Traffic Flow Profile Comparison
Metric
Cook
Illinois
Average
Difference
Traffic
14,119
8,480
+66.5%
Truck % (Total Traffic)
7.1%
10.2%
-30.6%
Truck % (Highway)
11.0%
17.3%
-36.4%
Avg. Travel Time
35.4 min
34.1 min
+3.9%
Frequently Asked Questions
The average daily traffic volume is calculated at 14,119 vehicles per day, providing a baseline for daily operations and site assessment.
Trip origins in Cook have higher average income than 94% of counties in Illinois.
Drivers on Cook roads have a median age of 45 years, and the median household income of the neighborhoods trips originate from averages $99,445 - useful context for retail siting and customer profiling.
The average travel time for drivers is 35.4 minutes, offering a standard metric for commute and delivery route planning.
Trucks account for approximately 7.1% of the total traffic mix across all road types, with a significantly higher concentration of 11.0% on highways.
Traffic volumes are typically 4% higher during April–June. Volumes drop to their lowest levels in January, averaging 12,955 vehicles per day - a 8% decrease from the annual 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)
