
Total Traffic Volume & Performance in Shiawassee County, Michigan
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,893 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.8% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.1 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. | 13.0% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 49.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $70,902 |
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A typical monitored road in Shiawassee County, Michigan sees 3,893 vehicles per day, while its 415 miles of monitored roads together handle 1,681,565 vehicle-miles traveled per day (≈614 million per year). About 1 in 11 vehicles is a truck, in line with Michigan (7.7%).
Traffic 49% below the Michigan average
Shiawassee's average daily traffic volume is 49% lower than the state average - 3,893 vehicles per day against 7,697 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, Shiawassee accounts for about 0.8% of Michigan's statewide total of vehicle-miles. 55% of counties in Michigan see less traffic than Shiawassee's 3,893 vehicles per day.
Journey times here (34.1 minutes on average) closely track the state level. On travel time, Shiawassee runs longer than 60% of counties in Michigan.
The congestion ratio of 13.0% is 29% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Shiawassee County, Michigan
| Traffic | vehicles per day12,052 |
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| Trucks | 14.0% |
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| Average travel time | 57.2 min |
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| Congestion ratio | 27.1% |
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| Drivers’ average age | 47.7 yrs |
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| Drivers’ average income | $78,661 |
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A significant share of driving in Shiawassee County, Michigan, 40% of vehicle-miles, happens on highways. The average highway carries 12,052 vehicles per day, 217% more than the average non-highway road in the same area, which carries 3,805 vehicles per day.
Highways make up 14% of the monitored road miles (56 miles, 88 segments), so they carry more than their share: 676,259 vehicle-miles traveled per day (≈247 million per year).
62% of counties in Michigan move less traffic on their highways.
Higher highway truck share than 82% of counties in Michigan
The concentration of trucks on highways (14.0%) is 17% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
Shiawassee's highway truck share (14.0%) is higher than 82% of counties in Michigan. Shiawassee's highway truck count is higher than 71% of counties in Michigan, at roughly 1,690 trucks per day.

Non-highway Traffic in Shiawassee County, Michigan
| Traffic | vehicles per day3,805 |
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| Trucks | 5.2% |
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| Average travel time | 33.9 min |
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| Congestion ratio | 12.9% |
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| Drivers’ average age | 50.2 yrs |
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| Drivers’ average income | $69,140 |
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Local roads carry more than half of all travel in Shiawassee County, Michigan (60% of vehicle-miles). A typical local road sees 3,805 vehicles per day.
Local roads make up 86% of the monitored road miles (358 miles in 8,198 segments) but carry less than their share of travel: 1,005,306 vehicle-miles traveled per day (≈367 million per year). The truck share on non-highway roads is 5.2%.
Local roads carry 63% fewer trucks by share than highways
Compared to highways, non-highway routes see 63% fewer trucks by share.
The non-highway congestion ratio of 12.9% is 29% lower than the state level, suggesting more efficient local mobility than the state average.
Trip origins here have higher average income than 65% of counties in Michigan. The driver population here skews younger than 56% of counties in Michigan.