
Total Traffic Volume & Performance in Foster County, North Dakota
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day1,094 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 10.2% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 41.8 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. | 5.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 53.1 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $92,189 |
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The average monitored road in Foster County, North Dakota carries 1,094 vehicles per day. Across its 115 miles of monitored roads, that adds up to 96,660 vehicle-miles traveled per day (≈35.3 million per year). Trucks are 10.2% of traffic, close to the 11.1% across North Dakota.
Congestion 50% below the North Dakota average
At 1,094 vehicles per day, the average monitored road in Foster carries 50% less traffic than the state average of 2,174, suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 0.6% of North Dakota's statewide total. 69% of counties in North Dakota see less traffic than Foster's 1,094 vehicles per day.
At 41.8 minutes, the average travel time is 13% higher than the state level. On travel time, Foster runs longer than 60% of counties in North Dakota.
At 50% lower than the state level, the 5.3% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Foster County, North Dakota
| Traffic | vehicles per day2,945 |
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| Trucks | 11.7% |
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| Average travel time | 43.0 min |
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| Congestion ratio | 9.0% |
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| Drivers’ average age | 53.1 yrs |
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| Drivers’ average income | $80,727 |
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Highways carry about half of all travel in Foster County, North Dakota, 45% of vehicle-miles. The average highway carries 2,945 vehicles per day, 327% more than the average non-highway road in the same area, which carries 690 vehicles per day.
That comes from just 15% of the monitored road miles: 17 miles in 122 segments, carrying 43,703 vehicle-miles traveled per day (≈16.0 million per year).
Lower highway truck share than 97% of counties in North Dakota
At 11.7%, highway truck share is 19% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
By truck concentration, highways here trail 97% of counties in North Dakota. Foster's highway truck count is higher than 59% of counties in North Dakota, at roughly 345 trucks per day.

Non-highway Traffic in Foster County, North Dakota
| Traffic | vehicles per day690 |
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| Trucks | 8.9% |
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| Average travel time | 41.6 min |
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| Congestion ratio | 4.4% |
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| Drivers’ average age | 53.2 yrs |
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| Drivers’ average income | $98,244 |
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Local roads carry about half of all travel in Foster County, North Dakota, 55% of vehicle-miles. The average non-highway road carries 690 vehicles per day.
Local roads make up 85% of the monitored road miles (98 miles in 559 segments) but carry less than their share of travel: 52,957 vehicle-miles traveled per day (≈19.3 million per year). Trucks make up 8.9% of non-highway traffic, about 1 in 11 vehicles.
Drivers from higher-income areas than 92% of counties in North Dakota
Non-highway roads carry a truck concentration that's 24% lower than the highway network.
The non-highway congestion ratio of 4.4% is 59% lower than the state level, suggesting more efficient local mobility than the state average.
Trip origins here have higher average income than 92% of counties in North Dakota. Foster's median driver age is higher than 69% of counties in North Dakota.