
Total Traffic Volume & Performance in Madison County, Idaho
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day4,352 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.9% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.5 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. | 7.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 28.6 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $70,564 |
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The average monitored road in Madison County, Idaho carries 4,352 vehicles per day. Across its 165 miles of monitored roads, that adds up to 822,403 vehicle-miles traveled per day (≈300 million per year). About 1 in 14 vehicles is a truck, fewer than the 1 in 10 across Idaho.
Congestion 55% below the Idaho average
At 4,352 vehicles per day, the average monitored road in Madison carries 24% less traffic than the state average of 5,734, suggesting less demand on each road - a factor worth weighing in site selection and logistics planning. Network-wide, Madison accounts for about 1.8% of Idaho's statewide total of vehicle-miles. 74% of counties in Idaho see less traffic than Madison's 4,352 vehicles per day.
The average trip takes 33.5 minutes, on par with the state level. 51% of counties in Idaho have a shorter average travel time than Madison's 33.5 minutes.
Congestion runs 55% lower than the state level, at a ratio of 7.1%, which means smoother traffic flow - delays are rare enough to plan travel times almost to the minute.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Madison County, Idaho
| Traffic | vehicles per day11,236 |
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| Trucks | 8.4% |
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| Average travel time | 37.0 min |
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| Drivers’ average age | 34.9 yrs |
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| Drivers’ average income | $71,388 |
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A significant share of driving in Madison County, Idaho, 44% of vehicle-miles, happens on highways. The average highway carries 11,236 vehicles per day, 170% more than the average non-highway road in the same area, which carries 4,155 vehicles per day.
Highways make up 19% of the monitored road miles (31 miles, 65 segments), so they carry more than their share: 363,259 vehicle-miles traveled per day (≈133 million per year).
Lower highway truck share than 94% of counties in Idaho
The concentration of trucks on highways (8.4%) is 40% lower than the state average for similar road classifications. Highways here carry mainly commuter and local trips, with little through freight.
94% of counties in Idaho see a higher highway truck share than Madison's 8.4%. By raw truck volume, Madison carries more highway trucks than 65% of counties in Idaho.

Non-highway Traffic in Madison County, Idaho
| Traffic | vehicles per day4,155 |
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| Trucks | 5.8% |
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| Average travel time | 33.4 min |
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| Congestion ratio | 7.1% |
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| Drivers’ average age | 26.5 yrs |
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| Drivers’ average income | $69,852 |
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Local roads carry more than half of all travel in Madison County, Idaho (56% of vehicle-miles). On the average non-highway road, that comes to 4,155 vehicles per day.
Local roads make up 81% of the monitored road miles (134 miles in 2,275 segments) but carry less than their share of travel: 459,144 vehicle-miles traveled per day (≈168 million per year). The truck share on non-highway roads is 5.8%.
The youngest drivers of any county in Idaho
The concentration of trucks on non-highway roads is 32% lower than on highways.
Non-highway congestion (7.1%) runs 56% lower than the state average, pointing to smoother local traffic flow.
Madison's average driver income is lower than 53% of counties in Idaho. Drivers here also skew toward the lowest median age in Idaho, at 29 years.