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Traffic heat map of Sanilac County, Michigan: 346 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Main Street and Lakeshore Road

Sanilac County, Michigan Traffic Counts

Our Sanilac County, Michigan traffic data covers 2,808 road segments over 346 road miles, with an average segment of just 651 ft. The average road here carries 3,440 vehicles a day, 55% less than the Michigan average of 7,697. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Sanilac County, Michigan

Traffic

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

vehicles per day3,440
Trucks

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

7.2%
Average travel time

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

31.2 min
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

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

52.8 yrs
Drivers’ average income

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

$59,606

Our data shows 3,440 vehicles per day on the average road in Sanilac County, Michigan, and 801,965 vehicle-miles traveled per day (≈293 million per year) across its 346 miles of monitored roads. About 1 in 14 vehicles is a truck, in line with Michigan (7.7%).

Shorter trips than 85% of counties in Michigan

Sanilac's average daily traffic volume is 55% lower than the state average - 3,440 vehicles per day against 7,697 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries about 0.4% of Michigan's statewide total of vehicle-miles. Sanilac carries less traffic than 62% of counties in Michigan.

Journey times run 7% lower than the state level, at 31.2 minutes on average. 85% of counties in Michigan have a longer average travel time than Sanilac's 31.2 minutes.

The congestion ratio of 11.1% is 40% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.

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:
Weekends are somewhat quieter: volumes run about 8% below weekday levels, the usual weekend dip.
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 - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

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

Sanilac County vs. Michigan Traffic Comparison

Of the four measures, average daily traffic per road differs most: Sanilac County runs 55% below the Michigan average.

MetricSanilac CountyMichigan averageDifference
Traffic3,4407,697-55.3%
Truck % (Total Traffic)7.2%7.7%-6.2%
Avg. Travel Time31.2 min33.6 min-6.9%

How Sanilac County compares

Sanilac County against nearby counties

Compared with its 4 closest neighbours, 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.

Sanilac County ranked among 83 county-level areas in Michigan (1 = highest).
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

Busiest roads in Sanilac County, Michigan

Traffic concentrates on a few corridors: the three busiest roads average 8,733 vehicles a day, against 3,440 on the average road in Sanilac County.

Main Street is the busiest road, at 8,943 vehicles a day, 601 of them trucks (6.7%). Lakeshore Road is practically level with it at 8,702. Van Dyke Road carries the most trucks, 628 a day (7.3% of its traffic), although it ranks #3 for all traffic.

Trips using Van Dyke Road are long: a median of 47.2 minutes against 31.2 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Main StreetPrimary road · 8,943vehicles601trucks · 6.7%
Road class
Primary road
Congestion ratio
21.3%
Median trip time
44.0 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$56,190

Main Street is one of the more congested roads here: trips take 21% longer than at free-flow speed, against 11% county-wide.

2Lakeshore RoadPrimary road · 8,702vehicles536trucks · 6.2%
Road class
Primary road
Congestion ratio
20.5%
Median trip time
29.0 min
Drivers’ median age
54.5 yrs
Drivers’ average income
$63,707

Delays build on Lakeshore Road: its congestion ratio of 20% over free-flow time is well above the county's 11%.

3Van Dyke RoadPrimary road · 8,555vehicles628trucks · 7.3%
Road class
Primary road
Congestion ratio
20.1%
Median trip time
47.2 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$58,610

Van Dyke Road peaks at 8,555 vehicles a day, 2.5 times the county average; trucks are 7.3% of it, in line with the county-wide 7.2%.

4Elk StreetSecondary road · 6,546vehicles291trucks · 4.4%
Road class
Secondary road
Congestion ratio
15.4%
Median trip time
27.4 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$63,857

Elk Street carries 90% more than the county average at its busiest, 291 of them trucks (4.4%, below the county-wide 7.2%).

5Sanilac RoadPrimary road · 5,289vehicles413trucks · 7.8%
Road class
Primary road
Congestion ratio
19.1%
Median trip time
29.1 min
Drivers’ median age
49.8 yrs
Drivers’ average income
$61,259

Sanilac Road carries 54% more than the county average on its busiest stretch, where the median trip lasts 29.1 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Van Dyke RoadPrimary road · #3 by traffic8,555vehicles628trucks · 7.3%
2Main StreetPrimary road · #1 by traffic8,943vehicles601trucks · 6.7%
3Lakeshore RoadPrimary road · #2 by traffic8,702vehicles536trucks · 6.2%
4Sanilac RoadPrimary road · #5 by traffic5,289vehicles413trucks · 7.8%
5Sandusky RoadSecondary road · 4,993vehicles304trucks · 6.1%
Road class
Secondary road
Congestion ratio
11.7%
Median trip time
27.8 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$64,002

At 45% more than the county average, Sandusky Road draws drivers from neighborhoods averaging $64,002 in household income.

How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

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

SanilacDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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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.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.