
Total Traffic Volume & Performance in Alexander County, Illinois
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day2,547 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 17.3% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 43.2 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. | 7.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 51.7 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $49,823 |
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Our data shows 2,547 vehicles per day on the average road in Alexander County, Illinois, and 243,078 vehicle-miles traveled per day (≈88.7 million per year) across its 99 miles of monitored roads. Freight weighs heavily here: trucks are 17.3% of traffic, against 10.2% across Illinois.
The longest trips of any county in Illinois
Alexander's average daily traffic volume is 70% lower than the state average - 2,547 vehicles per day against 8,480 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Across the whole network, that travel is about 0.1% of Illinois's statewide total. 62% of counties in Illinois see more traffic than Alexander's 2,547 vehicles per day.
The average trip takes 43.2 minutes, 27% higher than the state level. Alexander additionally records the highest average travel time of any county in Illinois - 43.2 minutes.
The congestion ratio of 7.3% is 64% lower, pointing to smoother traffic flow than the state level - delays are rare enough to plan travel times almost to the minute.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Alexander County, Illinois
| Traffic | vehicles per day3,562 |
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| Trucks | 52.5% |
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| Average travel time | 48.2 min |
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| Congestion ratio | 7.5% |
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| Drivers’ average age | 51.9 yrs |
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| Drivers’ average income | $56,868 |
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At 17% of vehicle-miles, highways carry a smaller share of the traffic in Alexander County, Illinois than local roads. The average highway carries 3,562 vehicles per day, 41% more than the average non-highway road in the same area, which carries 2,520 vehicles per day.
With 11% of the road miles (11 miles in 24 segments), highways punch above their length, carrying 41,180 vehicle-miles traveled per day (≈15.0 million per year).
The highest highway truck share of any county in Illinois
Highway truck concentration here runs 203% higher than the state average, at 52.5%. That marks Alexander as a major freight corridor, where highway access is what logistics operators compete on.
By share, Alexander has the highest highway truck concentration in Illinois, at 52.5%. Alexander's highway truck count is lower than 52% of counties in Illinois, at roughly 1,868 trucks per day.

Non-highway Traffic in Alexander County, Illinois
| Traffic | vehicles per day2,520 |
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| Trucks | 10.1% |
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| Average travel time | 43.1 min |
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| Congestion ratio | 7.3% |
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| Drivers’ average age | 51.7 yrs |
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| Drivers’ average income | $49,452 |
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Local roads carry the vast majority of travel in Alexander County, Illinois, 83% of all vehicle-miles. A typical local road sees 2,520 vehicles per day.
Their share of road miles is similar, 89% (88 miles in 888 segments), carrying 201,898 vehicle-miles traveled per day (≈73.7 million per year). Trucks make up 10.1% of non-highway traffic, about 1 in 10 vehicles.
The lowest driver income of any county in Illinois
Compared to highways, non-highway routes see 81% fewer trucks by share.
The non-highway congestion ratio of 7.3% is 64% lower than the state level, suggesting more efficient local mobility than the state average.
Trips here originate from the lowest average driver income in Illinois, at $49,823. Alexander's median driver age is higher than 84% of counties in Illinois.