
Total Traffic Volume & Performance in Lee County, Illinois
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,018 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 17.2% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.4 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. | 8.8% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.1 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $75,932 |
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Our data shows 3,018 vehicles per day on the average road in Lee County, Illinois, and 1,487,962 vehicle-miles traveled per day (≈543 million per year) across its 412 miles of monitored roads. Freight weighs heavily here: trucks are 17.2% of traffic, against 10.2% across Illinois.
Traffic 64% below the Illinois average
At 3,018 vehicles per day, the average monitored road in Lee carries 64% less traffic than the state average of 8,480, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 0.6% of Illinois's statewide total. Lee carries more traffic than 52% of counties in Illinois.
The average trip takes 32.4 minutes, 5% lower than the state level. On travel time, Lee runs shorter than 70% of counties in Illinois.
At 57% lower than the state level, the 8.8% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Lee County, Illinois
| Traffic | vehicles per day6,695 |
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| Trucks | 23.6% |
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| Average travel time | 66.2 min |
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| Congestion ratio | 14.7% |
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| Drivers’ average age | 47.1 yrs |
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| Drivers’ average income | $75,445 |
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A little more than half of the driving in Lee County, Illinois happens on highways: 59% of all vehicle-miles. The average highway carries 6,695 vehicles per day, 137% more than the average non-highway road in the same area, which carries 2,821 vehicles per day.
With 26% of the road miles (108 miles in 124 segments), highways punch above their length, carrying 877,849 vehicle-miles traveled per day (≈320 million per year).
That is more highway travel volume than 74% of counties in Illinois.
Freight-heavy highways
At 23.6%, highway truck share is 36% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.
Lee's highway truck share (23.6%) is higher than 64% of counties in Illinois. By raw truck volume, Lee carries fewer highway trucks than 53% of counties in Illinois.

Non-highway Traffic in Lee County, Illinois
| Traffic | vehicles per day2,821 |
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| Trucks | 7.9% |
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| Average travel time | 30.6 min |
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| Congestion ratio | 8.5% |
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| Drivers’ average age | 50.5 yrs |
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| Drivers’ average income | $76,047 |
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A significant share of driving in Lee County, Illinois, 41% of vehicle-miles, happens on local roads. A typical local road sees 2,821 vehicles per day.
Spread over 304 miles and 2,313 segments, 74% of the road network, local roads carry a lighter load per mile: 610,112 vehicle-miles traveled per day (≈223 million per year). The truck share on non-highway roads is 7.9%.
Local congestion 59% below the Illinois average
Non-highway roads carry a truck concentration that's 66% lower than the highway network.
The non-highway congestion ratio of 8.5% is 59% lower than the state level, suggesting more efficient local mobility than the state average.
62% of counties in Illinois see lower average driver income among trip origins than Lee. 65% of counties in Illinois have a younger driver population than Lee.