
Total Traffic Volume & Performance in Latah County, Idaho
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,841 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 7.5% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 30.0 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. | 17.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 31.3 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $65,570 |
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The average monitored road in Latah County, Idaho carries 3,841 vehicles per day. Across its 185 miles of monitored roads, that adds up to 416,488 vehicle-miles traveled per day (≈152 million per year). About 1 in 13 vehicles is a truck, fewer than the 1 in 10 across Idaho.
Shorter trips than 79% of counties in Idaho
Latah's average daily traffic volume is 33% lower than the state average - 3,841 vehicles per day against 5,734 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Latah accounts for about 0.9% of Idaho's statewide total of vehicle-miles. 65% of counties in Idaho see less traffic than Latah's 3,841 vehicles per day.
Journey times run 11% lower than the state level, at 30.0 minutes on average. 79% of counties in Idaho have a longer average travel time than Latah's 30.0 minutes.
The congestion ratio of 17.3% runs slightly higher than the state level (8% higher).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Latah County, Idaho
| Traffic | vehicles per day6,058 |
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| Trucks | 9.1% |
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| Average travel time | 40.1 min |
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| Congestion ratio | 16.0% |
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| Drivers’ average age | 34.8 yrs |
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| Drivers’ average income | $64,659 |
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Highways carry about half of all travel in Latah County, Idaho, 50% of vehicle-miles. The average highway carries 6,058 vehicles per day, 82% more than the average non-highway road in the same area, which carries 3,328 vehicles per day.
With 27% of the road miles (51 miles in 454 segments), highways punch above their length, carrying 209,095 vehicle-miles traveled per day (≈76.3 million per year).
Lower highway truck share than 85% of counties in Idaho
Highway truck concentration here runs 35% lower than the state average, at 9.1%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
By truck concentration, highways here trail 85% of counties in Idaho. 82% of counties in Idaho see more highway trucks per day than Latah's roughly 551.

Non-highway Traffic in Latah County, Idaho
| Traffic | vehicles per day3,328 |
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| Trucks | 6.0% |
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| Average travel time | 27.7 min |
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| Congestion ratio | 17.6% |
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| Drivers’ average age | 29.9 yrs |
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| Drivers’ average income | $66,302 |
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Local roads carry about half of all travel in Latah County, Idaho, 50% of vehicle-miles. On the average non-highway road, that comes to 3,328 vehicles per day.
Spread over 134 miles and 1,961 segments, 73% of the road network, local roads carry a lighter load per mile: 207,392 vehicle-miles traveled per day (≈75.7 million per year). About 1 in 17 vehicles on non-highway roads is a truck (6.0%).
Younger drivers than 98% of counties in Idaho
The concentration of trucks on non-highway roads is 34% lower than on highways.
Non-highway congestion (17.6%) runs slightly higher than the state level (7% higher).
Trip origins here have lower average income than 74% of counties in Idaho. The driver population here skews younger than 98% of counties in Idaho.