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Traffic heat map of Miami County, Ohio: 529 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 75 and Market Street

Miami County, Ohio Traffic Counts

How busy are the roads of Miami County, Ohio? We measure 529 road miles, divided into 11,077 segments, with multi-sourced, cross-verified mobile and sensor data. Its highways rank among the top 5 counties in Ohio for trucks per day. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in Miami County, Ohio

Traffic

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

vehicles per day3,736
Trucks

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

11.6%
Average travel time

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

34.8 min
Congestion ratio

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

12.7%
Drivers’ average age

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

49.4 yrs
Drivers’ average income

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

$80,892

A typical monitored road in Miami County, Ohio sees 3,736 vehicles per day, while its 529 miles of monitored roads together handle 2,543,512 vehicle-miles traveled per day (≈928 million per year). Trucks are 11.6% of traffic, more than the 9.9% across Ohio.

Longer trips than 72% of counties in Ohio

Miami's average daily traffic volume is 35% lower than the state average - 3,736 vehicles per day against 5,773 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Miami accounts for about 1.0% of Ohio's statewide total of vehicle-miles. By volume, Miami's 3,736 vehicles per day outpaces 63% of counties in Ohio.

Journey times run 6% higher than the state level, at 34.8 minutes on average. Its average travel time of 34.8 minutes is longer than 72% of counties in Ohio.

At 23% lower than the state level, the 12.7% congestion ratio signals smoother traffic flow - relevant for traffic control and delivery planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Miami County, Ohio

Trafficvehicles per day21,989
Trucks18.4%
Average travel time50.8 min
Congestion ratio34.8%
Drivers’ average age48.8 yrs
Drivers’ average income$83,064

Travel in Miami County, Ohio splits roughly evenly, with about half of it (49% of vehicle-miles) on highways. The average highway carries 21,989 vehicles per day, 515% more than the average non-highway road in the same area, which carries 3,577 vehicles per day.

Yet highways are only 9% of the road network, 46 miles in 96 segments, so each mile of them is 5.6 times as busy as the average road mile.

65% of counties in Ohio move less traffic on their highways.

More highway trucks than 96% of counties in Ohio

At 18.4%, highway truck share is 24% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

Miami's highway truck share (18.4%) is higher than 55% of counties in Ohio. By raw truck volume, Miami carries more highway trucks than 96% of counties in Ohio.

non-highway traffic icon

Non-highway Traffic in Miami County, Ohio

Trafficvehicles per day3,577
Trucks5.1%
Average travel time34.6 min
Congestion ratio12.5%
Drivers’ average age49.6 yrs
Drivers’ average income$79,864

Travel in Miami County, Ohio splits roughly evenly, with about half of it (51% of vehicle-miles) on local roads. The average non-highway road carries 3,577 vehicles per day.

Spread over 483 miles and 10,981 segments, 91% of the road network, local roads carry a lighter load per mile: 1,302,806 vehicle-miles traveled per day (≈476 million per year). Trucks make up 5.1% of non-highway traffic, about 1 in 20 vehicles.

Drivers from higher-income areas than 77% of counties in Ohio

Compared to highways, non-highway routes see 72% fewer trucks by share.

At 21% lower than the state level, the non-highway congestion ratio of 12.5% signals easier movement on local roads.

77% of counties in Ohio see lower average driver income among trip origins than Miami. The driver population here skews older than 61% of counties in Ohio.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 79% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 24% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
August–October is the high season, with volumes +7% versus the annual average.
Lowest month:
January is the quietest month, with volumes -15% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Miami County, Ohio, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +7% in high season.

Miami County vs. Ohio Traffic Comparison

Of the four measures, average daily traffic per road differs most: Miami County runs 35% below the Ohio average. Its highway truck share, by contrast, is 24% above.

MetricMiami CountyOhio averageDifference
Traffic3,7365,773-35.3%
Truck % (Total Traffic)11.6%9.9%+17.0%
Truck % (Highway)18.4%14.9%+23.8%
Avg. Travel Time34.8 min32.9 min+5.9%

How Miami County compares

Miami County against nearby counties

Nothing in this table sets Miami County sharply apart from the 4 areas nearest to it, though it has the third busiest roads of the five.

Miami County and the 4 nearest county-level areas by centroid distance, with the Ohio average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Miami County3,73611.6%2,543,51234.8 min12.7%
Montgomery County, Ohio7,7618.6%10,748,48231.8 min20.3%
Darke County, Ohio2,3718.3%987,46436.2 min7.9%
Clark County, Ohio5,74214.0%3,383,18640.0 min15.4%
Shelby County, Ohio2,74618.2%1,687,73630.7 min10.1%
Ohio average5,7739.9%N/A32.9 min16.5%

Miami County ranked within Ohio

Miami County sits in the top quarter of the Ohio field on highway truck volume, at #4 of 83.

Miami County ranked among 88 county-level areas in Ohio (1 = highest); measures without data in every county rank a smaller field, down to 83.
MeasureMiami CountyOhio rank
Traffic volume (AADT)3,736#33 of 88
Highway vehicle-miles per day1,240,706#30 of 83
Truck share on highways18.4%#38 of 83
Highway trucks per day4,053#4 of 83
Average travel time34.8 min#25 of 88
Average driver income$80,892#21 of 88
Average driver age49.4 yrs#35 of 88

Busiest roads in Miami County, Ohio

The three busiest roads in Miami County average 30,953 vehicles a day, 8.3 times the county average of 3,736 across all its monitored roads.

I 75 is the busiest road, at 55,062 vehicles a day, 10,197 of them trucks (18.5%). No other road comes close: Market Street, in second place, carries 19,533. It also carries the most trucks.

I 75 carries longer journeys than most roads here, with a median trip of 50.8 minutes against 34.8 county-wide.

Trucks make up 18.5% of traffic on I 75, against 11.6% across all roads in the county.

Market Street is busy with cars rather than freight: only 5.0% of its traffic is trucks, against 11.6% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 75Motorway · 55,062vehicles10,197trucks · 18.5%
Road class
Motorway
Congestion ratio
39.2%
Median trip time
50.8 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$83,277

I 75 is a trunk route for the county, carrying 14.7 times the county average on its busiest stretch; trucks are 18.5% of it, above the county-wide 11.6%.

2Market StreetSecondary road · 19,533vehicles979trucks · 5.0%
Road class
Secondary road
Congestion ratio
55.6%
Median trip time
49.9 min
Drivers’ median age
49.0 yrs
Drivers’ average income
$67,020

Market Street is one of the more congested roads here: trips take 56% longer than at free-flow speed, against 13% county-wide.

3Main StreetSecondary road · 18,265vehicles978trucks · 5.4%
Road class
Secondary road
Congestion ratio
47.6%
Median trip time
38.9 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$73,744

Delays build on Main Street: its congestion ratio of 48% over free-flow time is well above the county's 13%.

4I 75 Business / County Road 25ASecondary road · 16,138vehicles830trucks · 5.1%
Road class
Secondary road
Congestion ratio
38.0%
Median trip time
32.3 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$93,913

At 4.3 times the county average, I 75 Business / County Road 25A draws drivers from neighborhoods averaging $93,913 in household income.

5Ash StreetPrimary road · 13,060vehicles679trucks · 5.2%
Road class
Primary road
Congestion ratio
19.8%
Median trip time
33.9 min
Drivers’ median age
50.1 yrs
Drivers’ average income
$72,274

The busiest stretch of Ash Street carries 3.5 times the county average; trucks are 5.2% of it, below the county-wide 11.6%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 75Motorway · #1 by traffic55,062vehicles10,197trucks · 18.5%
2Market StreetSecondary road · #2 by traffic19,533vehicles979trucks · 5.0%
3Main StreetSecondary road · #3 by traffic18,265vehicles978trucks · 5.4%
4I 75 Business / County Road 25ASecondary road · #4 by traffic16,138vehicles830trucks · 5.1%
5Broadway StreetPrimary road · 6,932vehicles793trucks · 11.4%
Road class
Primary road
Congestion ratio
16.2%
Median trip time
34.4 min
Drivers’ median age
52.3 yrs
Drivers’ average income
$67,730

At 86% more than the county average, Broadway Street draws drivers from neighborhoods averaging $67,730 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

MiamiDepartment 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 Miami County

The same traffic breakdown for the areas closest to Miami County, Ohio.

Need segment-level traffic data?

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