
Total Traffic Volume & Performance in Lake County, Illinois
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day11,336 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.7 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 27.2% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.1 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $129,334 |
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A typical monitored road in Lake County, Illinois sees 11,336 vehicles per day, while its 1,096 miles of monitored roads together handle 14,037,462 vehicle-miles traveled per day (≈5.1 billion per year). Trucks are a smaller part of the mix than across Illinois: 6.7% against 10.2%.
Busier roads than 98% of counties in Illinois
At 11,336 vehicles per day, the average monitored road in Lake carries 34% more traffic than the state average of 8,480, suggesting more demand on each road - a busier backdrop for retail sites, at the cost of slower access. In total volume terms, its road network carries about 5.9% of Illinois's statewide total of vehicle-miles. Lake carries more traffic than 98% of counties in Illinois.
The average trip takes 33.7 minutes, on par with the state level. Its average travel time of 33.7 minutes is shorter than 52% of counties in Illinois.
The congestion ratio of 27.2% is 32% higher, pointing to more pronounced congestion than the state level - a factor for delivery windows and signal timing.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Lake County, Illinois
| Traffic | vehicles per day24,436 |
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| Trucks | 13.8% |
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| Average travel time | 47.3 min |
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| Congestion ratio | 39.9% |
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| Drivers’ average age | 47.4 yrs |
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| Drivers’ average income | $129,416 |
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Highways carry a smaller share of travel in Lake County, Illinois, 23% of vehicle-miles; most driving happens on local roads. The average highway carries 24,436 vehicles per day, 120% more than the average non-highway road in the same area, which carries 11,128 vehicles per day.
With 10% of the road miles (111 miles in 488 segments), highways punch above their length, carrying 3,268,588 vehicle-miles traveled per day (≈1.2 billion per year).
By highway travel volume, that ranks Lake in the top 5 counties in Illinois.
More highway trucks than 91% of counties in Illinois
The concentration of trucks on highways (13.8%) is 20% lower than the state average for similar road classifications. Trucks are a small share of a very large highway flow, so Lake still moves heavy freight volumes alongside its passenger traffic.
Lake's highway truck share (13.8%) is lower than 75% of counties in Illinois. 91% of counties in Illinois see fewer highway trucks per day than Lake's roughly 3,372.

Non-highway Traffic in Lake County, Illinois
| Traffic | vehicles per day11,128 |
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| Trucks | 4.5% |
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| Average travel time | 33.5 min |
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| Congestion ratio | 27.0% |
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| Drivers’ average age | 47.1 yrs |
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| Drivers’ average income | $129,321 |
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Local roads carry most of the traffic in Lake County, Illinois: 77% of all vehicle-miles. On the average non-highway road, that comes to 11,128 vehicles per day.
Their share of road miles is similar, 90% (985 miles in 30,762 segments), carrying 10,768,874 vehicle-miles traveled per day (≈3.9 billion per year). Trucks make up 4.5% of non-highway traffic, about 1 in 22 vehicles.
The highest driver income of any county in Illinois
The concentration of trucks on non-highway roads is 67% lower than on highways.
Non-highway congestion (27.0%) runs 31% higher than the state average, pointing to slower local traffic flow.
At $129,334, the average driver income for trips originating here is the highest in Illinois. 79% of counties in Illinois have an older driver population than Lake.