
Total Traffic Volume & Performance in Marion County, Oregon
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day5,716 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.4% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.2 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. | 17.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 43.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $82,611 |
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Our data shows 5,716 vehicles per day on the average road in Marion County, Oregon, and 7,660,193 vehicle-miles traveled per day (≈2.8 billion per year) across its 1,054 miles of monitored roads. About 1 in 12 vehicles is a truck, in line with Oregon (9.2%).
Busier roads than 83% of counties in Oregon
Marion's average daily traffic volume of 5,716 vehicles per day is on par with the state average of 5,908. Across the whole network, that travel is about 8.8% of Oregon's statewide total. Marion carries more traffic than 83% of counties in Oregon.
The average trip takes 34.2 minutes, on par with the state level. Its average travel time of 34.2 minutes is shorter than 63% of counties in Oregon.
At 17.1%, the congestion ratio matches the state level closely.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Marion County, Oregon
| Traffic | vehicles per day17,072 |
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| Trucks | 11.3% |
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| Average travel time | 44.4 min |
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| Congestion ratio | 31.5% |
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| Drivers’ average age | 44.2 yrs |
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| Drivers’ average income | $82,937 |
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Travel in Marion County, Oregon splits roughly evenly, with about half of it (54% of vehicle-miles) on highways. The average highway carries 17,072 vehicles per day, 222% more than the average non-highway road in the same area, which carries 5,301 vehicles per day.
That comes from just 17% of the monitored road miles: 179 miles in 1,031 segments, carrying 4,135,165 vehicle-miles traveled per day (≈1.5 billion per year).
That puts Marion among the top 3 counties in Oregon for highway travel volume.
More highway trucks than 97% of counties in Oregon
Highway truck concentration here runs 6% lower than the state average, at 11.3%. The highway traffic mix is typical for Oregon: neither freight- nor commuter-dominated.
By truck concentration, highways here outrank 50% of counties in Oregon. By raw truck volume, Marion carries more highway trucks than 97% of counties in Oregon.

Non-highway Traffic in Marion County, Oregon
| Traffic | vehicles per day5,301 |
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| Trucks | 5.1% |
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| Average travel time | 33.8 min |
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| Congestion ratio | 16.6% |
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| Drivers’ average age | 43.8 yrs |
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| Drivers’ average income | $82,377 |
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Travel in Marion County, Oregon splits roughly evenly, with about half of it (46% of vehicle-miles) on local roads. A typical local road sees 5,301 vehicles per day.
Spread over 875 miles and 28,209 segments, 83% of the road network, local roads carry a lighter load per mile: 3,525,027 vehicle-miles traveled per day (≈1.3 billion per year). Trucks make up 5.1% of non-highway traffic, about 1 in 20 vehicles.
Younger drivers than 89% of counties in Oregon
The concentration of trucks on non-highway roads is 55% lower than on highways.
Non-highway congestion here (16.6%) closely tracks the state average.
Trip origins here have higher average income than 77% of counties in Oregon. 89% of counties in Oregon have an older driver population than Marion.