
Total Traffic Volume & Performance in Polk County, Oregon
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day4,539 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 7.1% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.6 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. | 15.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 44.2 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $83,043 |
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Our data shows 4,539 vehicles per day on the average road in Polk County, Oregon, and 1,522,964 vehicle-miles traveled per day (≈556 million per year) across its 351 miles of monitored roads. About 1 in 14 vehicles is a truck, fewer than the 1 in 11 across Oregon.
Busier roads than 69% of counties in Oregon
Polk sees 23% lower average daily traffic volume than the state average (4,539 vehicles per day against 5,908), suggesting less demand on each road - a critical factor for logistics and site planning. Network-wide, Polk accounts for about 1.8% of Oregon's statewide total of vehicle-miles. By volume, Polk's 4,539 vehicles per day outpaces 69% of counties in Oregon.
Journey times here (35.6 minutes on average) closely track the state level. On travel time, Polk runs longer than 60% of counties in Oregon.
Congestion is somewhat lower than the state level, at a ratio of 15.3% (7% lower).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Polk County, Oregon
| Traffic | vehicles per day13,540 |
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| Trucks | 8.2% |
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| Average travel time | 41.1 min |
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| Congestion ratio | 28.3% |
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| Drivers’ average age | 44.5 yrs |
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| Drivers’ average income | $77,941 |
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Highways carry more than half of all travel in Polk County, Oregon (55% of vehicle-miles). The average highway carries 13,540 vehicles per day, 299% more than the average non-highway road in the same area, which carries 3,395 vehicles per day.
With 21% of the road miles (73 miles in 810 segments), highways punch above their length, carrying 841,764 vehicle-miles traveled per day (≈307 million per year).
Lower highway truck share than 75% of counties in Oregon
At 8.2%, highway truck share is 31% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
75% of counties in Oregon see a higher highway truck share than Polk's 8.2%. By raw truck volume, Polk carries fewer highway trucks than 62% of counties in Oregon.

Non-highway Traffic in Polk County, Oregon
| Traffic | vehicles per day3,395 |
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| Trucks | 5.7% |
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| Average travel time | 35.0 min |
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| Congestion ratio | 13.7% |
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| Drivers’ average age | 44.0 yrs |
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| Drivers’ average income | $86,402 |
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A significant share of driving in Polk County, Oregon, 45% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 3,395 vehicles per day.
Spread over 278 miles and 6,374 segments, 79% of the road network, local roads carry a lighter load per mile: 681,200 vehicle-miles traveled per day (≈249 million per year). About 1 in 18 vehicles on non-highway roads is a truck (5.7%).
Younger drivers than 86% of counties in Oregon
The concentration of trucks on non-highway roads is 31% lower than on highways.
Non-highway congestion (13.7%) runs 15% lower than the state average, pointing to smoother local traffic flow.
Polk's average driver income is higher than 80% of counties in Oregon. Polk's median driver age is lower than 86% of counties in Oregon.