
Total Traffic Volume & Performance in St. Joseph County, Michigan
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,479 |
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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. | 36.2 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. | 10.8% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 48.3 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $68,721 |
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A typical monitored road in St. Joseph County, Michigan sees 3,479 vehicles per day, while its 486 miles of monitored roads together handle 1,323,924 vehicle-miles traveled per day (≈483 million per year). Trucks are 7.5% of traffic, close to the 7.7% across Michigan.
Longer trips than 81% of counties in Michigan
At 3,479 vehicles per day, the average monitored road in St. Joseph carries 55% less traffic than the state average of 7,697, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries about 0.6% of Michigan's statewide total of vehicle-miles. St. Joseph carries less traffic than 59% of counties in Michigan.
At 36.2 minutes, the average travel time is 8% higher than the state level. Its average travel time of 36.2 minutes is longer than 81% of counties in Michigan.
At 41% lower than the state level, the 10.8% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in St. Joseph County, Michigan
| Traffic | vehicles per day9,660 |
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| Trucks | 11.0% |
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| Average travel time | 42.2 min |
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| Congestion ratio | 22.9% |
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| Drivers’ average age | 48.7 yrs |
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| Drivers’ average income | $73,863 |
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Highways carry a smaller share of travel in St. Joseph County, Michigan, 24% of vehicle-miles; most driving happens on local roads. The average highway carries 9,660 vehicles per day, 205% more than the average non-highway road in the same area, which carries 3,168 vehicles per day.
Yet highways are only 7% of the road network, 33 miles in 362 segments, so each mile of them is 3.5 times as busy as the average road mile.
A typical mix of freight and passenger traffic
The concentration of trucks on highways (11.0%) is 8% lower than the state average for similar road classifications. The highway traffic mix is typical for Michigan: neither freight- nor commuter-dominated.
St. Joseph's highway truck share (11.0%) is lower than 55% of counties in Michigan. St. Joseph's highway truck count is higher than 59% of counties in Michigan, at roughly 1,062 trucks per day.

Non-highway Traffic in St. Joseph County, Michigan
| Traffic | vehicles per day3,168 |
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| Trucks | 6.5% |
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| Average travel time | 35.9 min |
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| Congestion ratio | 10.2% |
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| Drivers’ average age | 48.1 yrs |
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| Drivers’ average income | $67,429 |
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Local roads carry most of the traffic in St. Joseph County, Michigan: 76% of all vehicle-miles. The average non-highway road carries 3,168 vehicles per day.
Local roads also make up about 93% of the monitored road miles: 452 miles in 7,200 segments, together carrying 1,007,262 vehicle-miles traveled per day (≈368 million per year). Trucks make up 6.5% of non-highway traffic, about 1 in 16 vehicles.
Local congestion 44% below the Michigan average
Non-highway roads carry a truck concentration that's 41% lower than the highway network.
Non-highway congestion (10.2%) runs 44% lower than the state average, pointing to smoother local traffic flow.
St. Joseph's average driver income is higher than 55% of counties in Michigan. St. Joseph's median driver age is lower than 70% of counties in Michigan.