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Traffic heat map of Gratiot County, Michigan: 236 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Bagley Road and US-127

Gratiot County, Michigan Traffic Counts

Our Gratiot County, Michigan traffic data covers 3,599 road segments over 236 road miles, with an average segment of just 347 ft. Its busiest road, Bagley Road, carries 23,514 vehicles a day, 5.6 times the average road. 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 Gratiot County, Michigan

Traffic

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

vehicles per day4,210
Trucks

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

10.2%
Average travel time

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

36.5 min
Congestion ratio

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

11.2%
Drivers’ average age

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

45.7 yrs
Drivers’ average income

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

$65,569

A typical monitored road in Gratiot County, Michigan sees 4,210 vehicles per day, while its 236 miles of monitored roads together handle 1,158,101 vehicle-miles traveled per day (≈423 million per year). At 10.2%, the truck share runs above the 7.7% across Michigan: about 1 in 10 vehicles.

Longer trips than 85% of counties in Michigan

At 4,210 vehicles per day, the average monitored road in Gratiot carries 45% less traffic than the state average of 7,697, 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 0.5% of Michigan's statewide total. By volume, Gratiot's 4,210 vehicles per day outpaces 60% of counties in Michigan.

At 36.5 minutes, the average travel time is 9% higher than the state level. On travel time, Gratiot runs longer than 85% of counties in Michigan.

At 39% lower than the state level, the 11.2% congestion ratio signals smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Gratiot County, Michigan

Trafficvehicles per day8,609
Trucks12.7%
Average travel time51.2 min
Congestion ratio19.6%
Drivers’ average age45.4 yrs
Drivers’ average income$65,568

Highways carry more than half of all travel in Gratiot County, Michigan (62% of vehicle-miles). The average highway carries 8,609 vehicles per day, 167% more than the average non-highway road in the same area, which carries 3,228 vehicles per day.

With 33% of the road miles (78 miles in 657 segments), highways punch above their length, carrying 719,964 vehicle-miles traveled per day (≈263 million per year).

That is more highway travel volume than 67% of counties in Michigan.

Higher highway truck share than 79% of counties in Michigan

At 12.7%, highway truck share is 6% higher than the state average. The highway traffic mix is typical for Michigan: neither freight- nor commuter-dominated.

79% of counties in Michigan see a lower highway truck share than Gratiot's 12.7%. Gratiot's highway truck count is higher than 64% of counties in Michigan, at roughly 1,089 trucks per day.

non-highway traffic icon

Non-highway Traffic in Gratiot County, Michigan

Trafficvehicles per day3,228
Trucks6.2%
Average travel time33.2 min
Congestion ratio9.3%
Drivers’ average age46.1 yrs
Drivers’ average income$65,570

Local roads carry a significant share of travel in Gratiot County, Michigan: 38% of all vehicle-miles. A typical local road sees 3,228 vehicles per day.

Spread over 158 miles and 2,942 segments, 67% of the road network, local roads carry a lighter load per mile: 438,137 vehicle-miles traveled per day (≈160 million per year). About 1 in 16 vehicles on non-highway roads is a truck (6.2%).

Younger drivers than 89% of counties in Michigan

The concentration of trucks on non-highway roads is 51% lower than on highways.

Non-highway congestion (9.3%) runs 49% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have higher average income than 51% of counties in Michigan. 89% of counties in Michigan have an older driver population than Gratiot.

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 86% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 11% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +11% versus the annual average.
Lowest month:
January is the quietest month, with volumes -20% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Gratiot County, Michigan, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +11% in high season.

Gratiot County vs. Michigan Traffic Comparison

Of the four measures, average daily traffic per road differs most: Gratiot County runs 45% below the Michigan average. Its truck share, by contrast, is 33% above.

MetricGratiot CountyMichigan averageDifference
Traffic4,2107,697-45.3%
Truck % (Total Traffic)10.2%7.7%+32.8%
Truck % (Highway)12.7%12.0%+5.8%
Avg. Travel Time36.5 min33.6 min+8.6%

How Gratiot County compares

Gratiot County moves the least traffic of its nearby counties

Against the 4 nearest areas, Gratiot County moves 44.7% of the total daily travel; it has the third busiest roads of the five. The same kind of road, just less of it: traffic per road matches the areas around it while the network itself is smaller.

Gratiot 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
Gratiot County4,21010.2%1,158,10136.5 min11.2%
Montcalm County, Michigan3,6658.1%1,654,19234.5 min12.2%
Clinton County, Michigan3,32010.9%2,641,85732.1 min9.3%
Isabella County, Michigan5,0818.1%1,563,01036.7 min13.9%
Saginaw County, Michigan5,6876.9%4,506,01635.3 min16.5%
Michigan average7,6977.7%N/A33.6 min18.5%

Gratiot County ranked within Michigan

Gratiot County sits in the bottom quarter of the Michigan field on average driver age, at #74 of 83.

Gratiot County ranked among 83 county-level areas in Michigan (1 = highest); measures without data in every county rank a smaller field, down to 74.
MeasureGratiot CountyMichigan rank
Traffic volume (AADT)4,210#34 of 83
Highway vehicle-miles per day719,964#25 of 74
Truck share on highways12.7%#16 of 74
Highway trucks per day1,089#27 of 74
Average travel time36.5 min#13 of 83
Average driver income$65,569#41 of 83
Average driver age45.7 yrs#74 of 83

Gratiot County ranks #13 of 83 on average travel time but #74 of 83 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Gratiot County, Michigan

On their busiest stretches, the three busiest roads in Gratiot County carry 20,472 vehicles a day on average, 4.9 times the typical road in the county (4,210).

Bagley Road is the busiest road, at 23,514 vehicles a day, 2,876 of them trucks (12.2%). It tops the truck ranking too, with the most trucks.

Trips using US 127 are long: a median of 59.3 minutes against 36.5 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Bagley RoadTrunk road · 23,514vehicles2,876trucks · 12.2%
Road class
Trunk road
Congestion ratio
26.4%
Median trip time
58.0 min
Drivers’ median age
44.6 yrs
Drivers’ average income
$70,016

Bagley Road carries through traffic: the median trip using it lasts 58.0 minutes, against 36.5 for the county.

2US-127Trunk road · 20,181vehicles2,583trucks · 12.8%
Road class
Trunk road
Congestion ratio
23.0%
Median trip time
58.8 min
Drivers’ median age
44.1 yrs
Drivers’ average income
$71,169

Drivers on US-127 are on long journeys, a median 58.8 minutes against 36.5 county-wide: a through route more than a local street.

3US 127Motorway · 17,721vehicles2,676trucks · 15.1%
Road class
Motorway
Congestion ratio
17.3%
Median trip time
59.3 min
Drivers’ median age
42.7 yrs
Drivers’ average income
$64,087

US 127 carries 4.2 times the county average on its busiest stretch, where the median trip lasts 59.3 minutes.

4Wright AvenuePrimary road · 13,069vehicles689trucks · 5.3%
Road class
Primary road
Congestion ratio
31.1%
Median trip time
29.7 min
Drivers’ median age
44.7 yrs
Drivers’ average income
$62,550

Travel on Wright Avenue's busiest stretch runs 31% over free-flow time, against 11% across the county, so expect slower peak hours.

5Alger RoadPrimary road · 10,791vehicles701trucks · 6.5%
Road class
Primary road
Congestion ratio
29.9%
Median trip time
31.7 min
Drivers’ median age
43.7 yrs
Drivers’ average income
$62,776

Alger Road is one of the more congested roads here: trips take 30% longer than at free-flow speed, against 11% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Bagley RoadTrunk road · #1 by traffic23,514vehicles2,876trucks · 12.2%
2US 127Motorway · #3 by traffic17,721vehicles2,676trucks · 15.1%
3US-127Trunk road · #2 by traffic20,181vehicles2,583trucks · 12.8%
4Monroe RoadTrunk road · 8,829vehicles838trucks · 9.5%
Road class
Trunk road
Congestion ratio
19.6%
Median trip time
38.5 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$65,791

At 2.1 times the county average, Monroe Road draws drivers from neighborhoods averaging $65,791 in household income.

5Alger RoadPrimary road · #5 by traffic10,791vehicles701trucks · 6.5%
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

GratiotDepartment 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 Gratiot County

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

Need segment-level traffic data?

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