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Sanilac County, Michigan Traffic Counts

This page delivers traffic analytics for Sanilac County, Michigan. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Sanilac County, Michigan among 346 road miles divided in 2,808 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 651 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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total traffic icon

Total Traffic Volume & Performance

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

3,440

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

7.2%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

31.2 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

11.1%

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

52.8 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$59,606

Our data indicates an estimated average traffic volume of 3,440 vehicles per day in Sanilac County, Michigan that results in 801,965 vehicle-miles traveled per day (≈293 million per year). The traffic stream is comprised of an average of 1 truck for every 14 vehicles. Typical time spent behind the wheel per trip is 31.2 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Michigan state averages: Sanilac sees 55% lower average daily traffic volume than the state average (3,440 vehicles per day against 7,697), suggesting less demand on each road - a critical factor for logistics and site planning. Network-wide, Sanilac accounts for about 0.4% of Michigan's statewide total, at 801,965 vehicle-miles traveled per day (≈293 million per year). At 31.2 minutes, the average travel time is 7% lower than the state level. At 40% lower than the state level, the 11.1% congestion ratio signals smoother traffic flow - crucial for traffic control improvement and logistics planning. Sanilac carries more traffic than 38% of counties in Michigan. On travel time, Sanilac runs longer than 15% of counties in Michigan.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

3,440

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

7.2%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

31.2 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

11.1%

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

52.8 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$59,606

The non-highway road network in Sanilac County, Michigan supports a substantial volume of traffic. The average non-highway road carries 3,440 vehicles per day. That average covers 346 non-highway road miles divided in 2,808 segments (average segment length 651 ft), together carrying 801,965 vehicle-miles traveled per day (≈293 million per year). Trucks constitute 7.2% of non-highway traffic.

Analytical insight

The non-highway congestion ratio of 11.1% is 39% lower than the state level, suggesting more efficient local mobility than the state average. Overall, average travel time here is longer than 15% of counties in Michigan. 28% of counties in Michigan see lower average driver income among trip origins than Sanilac. Sanilac's median driver age is higher than 63% of counties in Michigan.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 85% higher than the daily average.
Weekend traffic:
Weekend volumes run about 8% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +19% versus the annual average.
Lowest month:
January is the quietest month, with volumes -22% versus the annual average.

Analytical insight

In Sanilac County, Michigan, the peak hour concentrates about 8% of the day's traffic, and seasonal swing is pronounced at +19% in high season.

Traffic Flow Profile Comparison

Metric

Sanilac

Michigan
Average

Difference

Traffic

3,440

7,697

-55.3%

Truck % (Total Traffic)

7.2%

7.7%

-6.2%

Truck % (Highway)

12.0%

Avg. Travel Time

31.2 min

33.6 min

-6.9%

How Sanilac County compares

Sanilac County against nearby areas

Set against the average of the 4 areas nearest to it, Sanilac County moves 46.3% of the total daily travel; it has the third busiest roads of the five.

Sanilac County and the 4 nearest county-level areas by centroid distance, with the Michigan average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sanilac County3,4407.2%801,96531.2 min11.1%
Tuscola County, Michigan3,0027.5%869,22033.9 min8.6%
Lapeer County, Michigan5,6456.9%2,168,61333.9 min16.0%
Huron County, Michigan2,1577.5%709,10831.3 min8.2%
St. Clair County, Michigan5,9776.8%3,177,95331.7 min15.2%
Michigan average7,6977.7%N/A33.6 min18.5%

Sanilac County ranked within Michigan

Average travel time places Sanilac County #71 of 83 in Michigan - the bottom quarter of the state.

Where Sanilac County sits among Michigan's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureSanilac CountyMichigan rank
Traffic volume (AADT)3,440#52 of 83
Average travel time31.2 min#71 of 83
Average driver income$59,606#60 of 83
Average driver age52.8 yrs#31 of 83

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

MichiganDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near Sanilac County

The same traffic breakdown for the areas closest to Sanilac County, Michigan.

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