
Total Traffic Volume & Performance in Carroll County, Indiana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day2,815 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 10.5% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.1 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. | 48.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $67,357 |
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A typical monitored road in Carroll County, Indiana sees 2,815 vehicles per day, while its 163 miles of monitored roads together handle 462,194 vehicle-miles traveled per day (≈169 million per year). About 1 in 10 vehicles is a truck, in line with Indiana (12.1%).
Traffic 51% below the Indiana average
Carroll sees 51% lower average daily traffic volume than the state average (2,815 vehicles per day against 5,704), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Carroll accounts for about 0.3% of Indiana's statewide total of vehicle-miles. 75% of counties in Indiana see more traffic than Carroll's 2,815 vehicles per day.
At 34.1 minutes, the average travel time matches the state level closely. 53% of counties in Indiana have a longer average travel time than Carroll's 34.1 minutes.
The congestion ratio of 8.8% is 43% lower, pointing to smoother traffic flow than the state level - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Carroll County, Indiana
| Traffic | vehicles per day4,288 |
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| Trucks | 14.8% |
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| Average travel time | 42.1 min |
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| Congestion ratio | 9.9% |
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| Drivers’ average age | 47.7 yrs |
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| Drivers’ average income | $63,221 |
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A significant share of driving in Carroll County, Indiana, 31% of vehicle-miles, happens on highways. The average highway carries 4,288 vehicles per day, 55% more than the average non-highway road in the same area, which carries 2,768 vehicles per day.
Highways make up 21% of the monitored road miles (34 miles, 65 segments), so they carry more than their share: 143,551 vehicle-miles traveled per day (≈52.4 million per year).
Fewer highway trucks than 91% of counties in Indiana
Highway truck concentration here runs 24% lower than the state average, at 14.8%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
Carroll's highway truck share (14.8%) is lower than 78% of counties in Indiana. 91% of counties in Indiana see more highway trucks per day than Carroll's roughly 636.

Non-highway Traffic in Carroll County, Indiana
| Traffic | vehicles per day2,768 |
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| Trucks | 8.6% |
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| Average travel time | 33.8 min |
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| Congestion ratio | 8.8% |
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| Drivers’ average age | 49.1 yrs |
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| Drivers’ average income | $68,396 |
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A little more than half of the driving in Carroll County, Indiana happens on local roads: 69% of all vehicle-miles. On the average non-highway road, that comes to 2,768 vehicles per day.
Their share of road miles is similar, 79% (130 miles in 2,044 segments), carrying 318,642 vehicle-miles traveled per day (≈116 million per year). The truck share on non-highway roads is 8.6%.
Drivers from lower-income areas than 74% of counties in Indiana
The concentration of trucks on non-highway roads is 42% lower than on highways.
The non-highway congestion ratio of 8.8% is 42% lower than the state level, suggesting more efficient local mobility than the state average.
74% of counties in Indiana see higher average driver income among trip origins than Carroll. The driver population here skews older than 67% of counties in Indiana.