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Traffic heat map of Hillsdale County, Michigan: 344 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Meridian Road and Carleton Road

Hillsdale County, Michigan Traffic Counts

TrafficZoom tracks traffic on 344 road miles in Hillsdale County, Michigan, divided into 2,191 segments averaging 829 ft. Its busiest road, Meridian Road, carries 10,955 vehicles a day, 3.5 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Hillsdale County, Michigan

Traffic

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

vehicles per day3,137
Trucks

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

6.5%
Average travel time

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

33.5 min
Congestion ratio

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

10.0%
Drivers’ average age

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

49.5 yrs
Drivers’ average income

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

$63,442

The average monitored road in Hillsdale County, Michigan carries 3,137 vehicles per day. Across its 344 miles of monitored roads, that adds up to 866,830 vehicle-miles traveled per day (≈316 million per year). Trucks are a smaller part of the mix than across Michigan: 6.5% against 7.7%.

Traffic 59% below the Michigan average

Hillsdale's average daily traffic volume is 59% lower than the state average - 3,137 vehicles per day against 7,697 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Network-wide, Hillsdale accounts for about 0.4% of Michigan's statewide total of vehicle-miles. Hillsdale carries less traffic than 70% of counties in Michigan.

Journey times here (33.5 minutes on average) closely track the state level. 51% of counties in Michigan have a longer average travel time than Hillsdale's 33.5 minutes.

At 46% lower than the state level, the 10.0% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Hillsdale County, Michigan

Trafficvehicles per day11,038
Trucks9.8%
Average travel time41.8 min
Congestion ratio25.2%
Drivers’ average age50.1 yrs
Drivers’ average income$77,710

Highways play a minor role in Hillsdale County, Michigan, carrying just 1% of all vehicle-miles. The average highway carries 11,038 vehicles per day, 255% more than the average non-highway road in the same area, which carries 3,108 vehicles per day.

That comes from just less than 1% of the monitored road miles: 1 miles in 8 segments, carrying 6,525 vehicle-miles traveled per day (≈2.4 million per year).

Lower highway truck share than 67% of counties in Michigan

The concentration of trucks on highways (9.8%) is 18% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Hillsdale's highway truck share (9.8%) is lower than 67% of counties in Michigan. 60% of counties in Michigan see fewer highway trucks per day than Hillsdale's roughly 1,079.

non-highway traffic icon

Non-highway Traffic in Hillsdale County, Michigan

Trafficvehicles per day3,108
Trucks6.4%
Average travel time33.5 min
Congestion ratio9.9%
Drivers’ average age49.5 yrs
Drivers’ average income$63,329

Local roads carry nearly all of the traffic in Hillsdale County, Michigan, 99% of all vehicle-miles. A typical local road sees 3,108 vehicles per day.

Their share of road miles is similar, 100% (343 miles in 2,183 segments), carrying 860,305 vehicle-miles traveled per day (≈314 million per year). The truck share on non-highway roads is 6.4%.

Local congestion 46% below the Michigan average

Compared to highways, non-highway routes see 34% fewer trucks by share.

At 46% lower than the state level, the non-highway congestion ratio of 9.9% signals easier movement on local roads.

Trip origins here have lower average income than 59% of counties in Michigan. The driver population here skews younger than 59% 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 77% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 21% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +10% versus the annual average.
Lowest month:
January is the quietest month, with volumes -17% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Hillsdale County, Michigan, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +10% in high season.

Hillsdale County vs. Michigan Traffic Comparison

The average daily traffic per road sets Hillsdale County apart: 59% below the Michigan average. Its highway truck share is also 18% below.

MetricHillsdale CountyMichigan averageDifference
Traffic3,1377,697-59.2%
Truck % (Total Traffic)6.5%7.7%-16.0%
Truck % (Highway)9.8%12.0%-18.2%
Avg. Travel Time33.5 min33.6 min-0.1%

How Hillsdale County compares

Hillsdale County moves the least traffic of its nearby counties

Against the 4 nearest areas, Hillsdale County runs 6.0 percentage points less truck traffic and moves 45.4% of the total daily travel; it has the fourth busiest roads of the five.

Hillsdale 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
Hillsdale County3,1376.5%866,83033.5 min10.0%
Williams County, Ohio1,85021.5%1,189,37934.2 min7.1%
Branch County, Michigan3,31812.3%1,009,26234.1 min11.9%
Jackson County, Michigan4,67210.1%3,671,38033.9 min13.6%
Lenawee County, Michigan5,4176.1%1,759,74637.6 min15.0%
Michigan average7,6977.7%N/A33.6 min18.5%

Hillsdale County ranked within Michigan

Hillsdale County records the lowest highway travel volume in Michigan.

Hillsdale County ranked among 83 county-level areas in Michigan (1 = highest); measures without data in every county rank a smaller field, down to 74.
MeasureHillsdale CountyMichigan rank
Traffic volume (AADT)3,137#58 of 83
Highway vehicle-miles per day6,525#74 of 74
Truck share on highways9.8%#50 of 74
Highway trucks per day1,079#30 of 74
Average travel time33.5 min#43 of 83
Average driver income$63,442#49 of 83
Average driver age49.5 yrs#49 of 83

Hillsdale County ranks #30 of 74 on highway truck volume but #74 of 74 on highway travel volume - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Hillsdale County, Michigan

Traffic concentrates on a few corridors: the three busiest roads average 10,605 vehicles a day, against 3,137 on the average road in Hillsdale County.

Meridian Road leads with 10,955 vehicles a day, 1,072 of them trucks (9.8%). Carleton Road is practically level with it at 10,947. It also carries the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Meridian RoadTrunk road · 10,955vehicles1,072trucks · 9.8%
Road class
Trunk road
Congestion ratio
25.2%
Median trip time
41.8 min
Drivers’ median age
50.1 yrs
Drivers’ average income
$77,710

Meridian Road is one of the more congested roads here: trips take 25% longer than at free-flow speed, against 10% county-wide.

2Carleton RoadPrimary road · 10,947vehicles626trucks · 5.7%
Road class
Primary road
Congestion ratio
15.3%
Median trip time
29.7 min
Drivers’ median age
49.8 yrs
Drivers’ average income
$63,234

At 3.5 times the county average, Carleton Road draws drivers from neighborhoods averaging $63,234 in household income.

3Broad StreetSecondary road · 9,914vehicles343trucks · 3.5%
Road class
Secondary road
Congestion ratio
22.7%
Median trip time
27.1 min
Drivers’ median age
49.2 yrs
Drivers’ average income
$66,957

Delays build on Broad Street: its congestion ratio of 23% over free-flow time is well above the county's 10%.

4Olds StreetPrimary road · 9,155vehicles650trucks · 7.1%
Road class
Primary road
Congestion ratio
19.3%
Median trip time
30.5 min
Drivers’ median age
49.2 yrs
Drivers’ average income
$63,396

The busiest stretch of Olds Street carries 2.9 times the county average; trucks are 7.1% of it, above the county-wide 6.5%.

5Chicago RoadPrimary road · 7,870vehicles618trucks · 7.8%
Road class
Primary road
Congestion ratio
17.5%
Median trip time
38.8 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$72,302

On its busiest stretch, Chicago Road carries 2.5 times the county average; trucks are 7.8% of it, above the county-wide 6.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Meridian RoadTrunk road · #1 by traffic10,955vehicles1,072trucks · 9.8%
2Olds StreetPrimary road · #4 by traffic9,155vehicles650trucks · 7.1%
3Carleton RoadPrimary road · #2 by traffic10,947vehicles626trucks · 5.7%
4Chicago RoadPrimary road · #5 by traffic7,870vehicles618trucks · 7.8%
5Chicago StreetPrimary road · 7,764vehicles616trucks · 7.9%
Road class
Primary road
Median trip time
38.7 min
Drivers’ median age
48.7 yrs
Drivers’ average income
$59,665

Chicago Street peaks at 7,764 vehicles a day, 2.5 times the county average; trucks are 7.9% of it, above the county-wide 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

HillsdaleDepartment 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 Hillsdale County

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

Need segment-level traffic data?

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