
Total Traffic Volume & Performance in Monroe County, Illinois
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day4,877 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 7.0% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 29.5 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. | 13.0% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 49.2 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $97,159 |
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Our data shows 4,877 vehicles per day on the average road in Monroe County, Illinois, and 733,965 vehicle-miles traveled per day (≈268 million per year) across its 124 miles of monitored roads. Trucks are a smaller part of the mix than across Illinois: 7.0% against 10.2%.
Shorter trips than 99% of counties in Illinois
Monroe sees 42% lower average daily traffic volume than the state average (4,877 vehicles per day against 8,480), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 0.3% of Illinois's statewide total. 77% of counties in Illinois see less traffic than Monroe's 4,877 vehicles per day.
The average trip takes 29.5 minutes, 14% lower than the state level. 99% of counties in Illinois have a longer average travel time than Monroe's 29.5 minutes.
Congestion runs 37% lower than the state level, at a ratio of 13.0%, which means smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Monroe County, Illinois
| Traffic | vehicles per day12,654 |
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| Trucks | 7.9% |
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| Average travel time | 31.3 min |
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| Congestion ratio | 26.9% |
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| Drivers’ average age | 48.6 yrs |
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| Drivers’ average income | $96,439 |
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Travel in Monroe County, Illinois splits roughly evenly, with about half of it (51% of vehicle-miles) on highways. The average highway carries 12,654 vehicles per day, 180% more than the average non-highway road in the same area, which carries 4,516 vehicles per day.
With 23% of the road miles (29 miles in 91 segments), highways punch above their length, carrying 376,227 vehicle-miles traveled per day (≈137 million per year).
Lower highway truck share than 99% of counties in Illinois
The concentration of trucks on highways (7.9%) is 55% lower than the state average for similar road classifications. Highways here carry mainly commuter and local trips, with little through freight.
Monroe's highway truck share (7.9%) is lower than 99% of counties in Illinois. 70% of counties in Illinois see more highway trucks per day than Monroe's roughly 995.

Non-highway Traffic in Monroe County, Illinois
| Traffic | vehicles per day4,516 |
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| Trucks | 6.0% |
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| Average travel time | 29.4 min |
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| Congestion ratio | 12.3% |
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| Drivers’ average age | 49.5 yrs |
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| Drivers’ average income | $97,668 |
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Travel in Monroe County, Illinois splits roughly evenly, with about half of it (49% of vehicle-miles) on local roads. A typical local road sees 4,516 vehicles per day.
Spread over 95 miles and 1,962 segments, 77% of the road network, local roads carry a lighter load per mile: 357,738 vehicle-miles traveled per day (≈131 million per year). Trucks make up 6.0% of non-highway traffic, about 1 in 17 vehicles.
Drivers from higher-income areas than 92% of counties in Illinois
Compared to highways, non-highway routes see 24% fewer trucks by share.
At 40% lower than the state level, the non-highway congestion ratio of 12.3% signals easier movement on local roads.
Monroe's average driver income is higher than 92% of counties in Illinois. Monroe's median driver age is lower than 57% of counties in Illinois.