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Traffic heat map of Miami County, Indiana: 251 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 31 and North Broadway

Miami County, Indiana Traffic Counts

Traffic analytics for Miami County, Indiana, calculated from real-world mobile and sensor networks on 2,629 road segments (251 road miles, about 504 ft each). Its busiest road, US 31, carries 24,343 vehicles a day, 7.2 times the average road. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Miami County, Indiana

Traffic

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

vehicles per day3,371
Trucks

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

12.4%
Average travel time

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

36.9 min
Congestion ratio

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

11.3%
Drivers’ average age

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

48.4 yrs
Drivers’ average income

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

$62,792

A typical monitored road in Miami County, Indiana sees 3,371 vehicles per day, while its 251 miles of monitored roads together handle 936,138 vehicle-miles traveled per day (≈342 million per year). About 1 in 8 vehicles is a truck, in line with Indiana (12.1%).

Longer trips than 86% of counties in Indiana

Miami's average daily traffic volume is 41% lower than the state average - 3,371 vehicles per day against 5,704 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 0.6% of Indiana's statewide total of vehicle-miles. Miami carries less traffic than 58% of counties in Indiana.

Journey times run 10% higher than the state level, at 36.9 minutes on average. 86% of counties in Indiana have a shorter average travel time than Miami's 36.9 minutes.

Congestion runs 27% lower than the state level, at a ratio of 11.3%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Miami County, Indiana

Trafficvehicles per day8,315
Trucks14.7%
Average travel time59.1 min
Congestion ratio18.2%
Drivers’ average age48.6 yrs
Drivers’ average income$63,248

Most travel in Miami County, Indiana happens on highways, 74% of all vehicle-miles. The average highway carries 8,315 vehicles per day, 196% more than the average non-highway road in the same area, which carries 2,805 vehicles per day.

With 35% of the road miles (88 miles in 270 segments), highways punch above their length, carrying 689,231 vehicle-miles traveled per day (≈252 million per year).

That is more highway travel volume than 56% of counties in Indiana.

Lower highway truck share than 79% of counties in Indiana

The concentration of trucks on highways (14.7%) is 25% 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.

79% of counties in Indiana see a higher highway truck share than Miami's 14.7%. 76% of counties in Indiana see more highway trucks per day than Miami's roughly 1,218.

non-highway traffic icon

Non-highway Traffic in Miami County, Indiana

Trafficvehicles per day2,805
Trucks6.1%
Average travel time34.4 min
Congestion ratio10.5%
Drivers’ average age48.0 yrs
Drivers’ average income$62,273

Local roads carry a smaller share of travel in Miami County, Indiana, 26% of vehicle-miles; most driving happens on highways. On the average non-highway road, that comes to 2,805 vehicles per day.

Local roads make up 65% of the monitored road miles (163 miles in 2,359 segments) but carry less than their share of travel: 246,907 vehicle-miles traveled per day (≈90.1 million per year). The truck share on non-highway roads is 6.1%.

Drivers from lower-income areas than 92% of counties in Indiana

Non-highway roads carry a truck concentration that's 59% lower than the highway network.

The non-highway congestion ratio of 10.5% is 31% lower than the state level, suggesting more efficient local mobility than the state average.

92% of counties in Indiana see higher average driver income among trip origins than Miami. Miami's median driver age is higher than 58% of counties in Indiana.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Miami County, Indiana, the peak hour concentrates about 7% of the day's traffic.

Miami County vs. Indiana Traffic Comparison

Of the four measures, average daily traffic per road differs most: Miami County runs 41% below the Indiana average. Its highway truck share is also 25% below.

MetricMiami CountyIndiana averageDifference
Traffic3,3715,704-40.9%
Truck % (Total Traffic)12.4%12.1%+2.3%
Truck % (Highway)14.7%19.6%-25.2%
Avg. Travel Time36.9 min33.5 min+10.1%

How Miami County compares

Miami County against nearby counties

Miami County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next 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 Indiana average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Miami County3,37112.4%936,13836.9 min11.3%
Wabash County, Indiana3,31910.2%625,50533.2 min11.6%
Cass County, Indiana3,95610.5%689,29637.5 min12.8%
Fulton County, Indiana2,84412.6%492,19732.2 min8.5%
Howard County, Indiana5,6208.0%1,337,22634.6 min16.1%
Indiana average5,70412.1%N/A33.5 min15.6%

Miami County ranked within Indiana

Average driver income places Miami County #85 of 92 in Indiana - the bottom quarter of the state.

Miami County ranked among 92 county-level areas in Indiana (1 = highest); measures without data in every county rank a smaller field, down to 79.
MeasureMiami CountyIndiana rank
Traffic volume (AADT)3,371#54 of 92
Highway vehicle-miles per day689,231#35 of 79
Truck share on highways14.7%#63 of 79
Highway trucks per day1,218#60 of 79
Average travel time36.9 min#14 of 92
Average driver income$62,792#85 of 92
Average driver age48.4 yrs#39 of 92

Miami County ranks #14 of 92 on average travel time but #85 of 92 on average driver income - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Miami County, Indiana

The three busiest roads in Miami County average 13,613 vehicles a day, 4.0 times the county average of 3,371 across all its monitored roads.

US 31 leads with 24,343 vehicles a day, 2,838 of them trucks (11.7%). That is 2.9 times the next road, North Broadway (8,403). It tops the truck ranking too, with the most trucks.

US 31 carries longer journeys than most roads here, with a median trip of 54.4 minutes against 36.9 county-wide.

North Broadway is busy with cars rather than freight: only 4.8% of its traffic is trucks, against 12.4% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 31Trunk road · 24,343vehicles2,838trucks · 11.7%
Road class
Trunk road
Congestion ratio
26.8%
Median trip time
54.4 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$62,884

Delays build on US 31: its congestion ratio of 27% over free-flow time is well above the county's 11%.

2North BroadwaySecondary road · 8,403vehicles400trucks · 4.8%
Road class
Secondary road
Congestion ratio
21.1%
Median trip time
33.7 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$56,351

Travel on North Broadway's busiest stretch runs 21% over free-flow time, against 11% across the county, so expect slower peak hours.

3US 24Trunk road · 8,093vehicles1,172trucks · 14.5%
Road class
Trunk road
Congestion ratio
11.5%
Median trip time
50.5 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$64,617

Drivers on US 24 are on long journeys, a median 50.5 minutes against 36.9 county-wide: a through route more than a local street.

4Main StreetSecondary road · 7,626vehicles400trucks · 5.2%
Road class
Secondary road
Congestion ratio
20.5%
Median trip time
35.3 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$55,135

At 2.3 times the county average, Main Street draws drivers from neighborhoods averaging $55,135 in household income.

5Business US-31Secondary road · 6,639vehicles272trucks · 4.1%
Road class
Secondary road
Congestion ratio
18.3%
Median trip time
29.1 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$57,719

The busiest stretch of Business US-31 carries 2.0 times the county average; trucks are 4.1% of it, below the county-wide 12.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 31Trunk road · #1 by traffic24,343vehicles2,838trucks · 11.7%
2US 24Trunk road · #3 by traffic8,093vehicles1,172trucks · 14.5%
3Wabash RoadTrunk road · 4,773vehicles778trucks · 16.3%
Road class
Trunk road
Congestion ratio
9.1%
Median trip time
52.5 min
Drivers’ median age
48.7 yrs
Drivers’ average income
$61,910

Wabash Road carries through traffic: the median trip using it lasts 52.5 minutes, against 36.9 for the county.

4North BroadwaySecondary road · #2 by traffic8,403vehicles400trucks · 4.8%
5Main StreetSecondary road · #4 by traffic7,626vehicles400trucks · 5.2%
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, Indiana.

Need segment-level traffic data?

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