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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day4,615 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 10.9% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 43.6 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 14.3% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 48.5 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $68,188 |
The average monitored road in Marion County, Ohio carries 4,615 vehicles per day. Across its 358 miles of monitored roads, that adds up to 1,288,102 vehicle-miles traveled per day (≈470 million per year). About 1 in 9 vehicles is a truck, in line with Ohio (9.9%).
Marion's average daily traffic volume is 20% lower than the state average - 4,615 vehicles per day against 5,773 - suggesting less traffic load per road - a critical factor for logistics and site planning. In total volume terms, its road network carries about 0.5% of Ohio's statewide total of vehicle-miles. 77% of counties in Ohio see less traffic than Marion's 4,615 vehicles per day.
The average trip takes 43.6 minutes, 33% higher than the state level. At 43.6 minutes, Marion also has the highest average travel time in Ohio.
The congestion ratio of 14.3% runs slightly lower than the state level (13% lower) - relevant for traffic control and delivery planning.
| Traffic | vehicles per day10,688 |
|---|---|
| Trucks | 18.9% |
| Average travel time | 60.5 min |
| Congestion ratio | 23.4% |
| Drivers’ average age | 47.6 yrs |
| Drivers’ average income | $84,406 |
A significant share of driving in Marion County, Ohio, 34% of vehicle-miles, happens on highways. The average highway carries 10,688 vehicles per day, 141% more than the average non-highway road in the same area, which carries 4,430 vehicles per day.
Yet highways are only 11% of the road network, 40 miles in 105 segments, so each mile of them is 3.1 times as busy as the average road mile.
The concentration of trucks on highways (18.9%) is 27% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
57% of counties in Ohio see a lower highway truck share than Marion's 18.9%. By raw truck volume, Marion carries more highway trucks than 56% of counties in Ohio.
| Traffic | vehicles per day4,430 |
|---|---|
| Trucks | 6.7% |
| Average travel time | 43.1 min |
| Congestion ratio | 14.0% |
| Drivers’ average age | 48.6 yrs |
| Drivers’ average income | $65,082 |
A little more than half of the driving in Marion County, Ohio happens on local roads: 66% of all vehicle-miles. On the average non-highway road, that comes to 4,430 vehicles per day.
Spread over 318 miles and 3,442 segments, 89% of the road network, local roads carry a lighter load per mile: 845,284 vehicle-miles traveled per day (≈309 million per year). Trucks make up 6.7% of non-highway traffic, about 1 in 15 vehicles.
Compared to highways, non-highway routes see 64% fewer trucks by share.
Non-highway congestion (14.0%) runs slightly lower than the state level (12% lower).
60% of counties in Ohio see higher average driver income among trip origins than Marion. The driver population here skews younger than 63% of counties in Ohio.
The average travel time sets Marion County apart: 33% above the Ohio average. Its highway truck share is also 27% above.
| Metric | Marion County | Ohio average | Difference |
|---|---|---|---|
| Traffic | 4,615 | 5,773 | -20.1% |
| Truck % (Total Traffic) | 10.9% | 9.9% | +10.1% |
| Truck % (Highway) | 18.9% | 14.9% | +27.1% |
| Avg. Travel Time | 43.6 min | 32.9 min | +32.8% |
Set against the average of the 4 areas nearest to it, Marion County sees 35.8% longer typical trips; it has the second busiest roads of the five.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Marion County | 4,615 | 10.9% | 1,288,102 | 43.6 min | 14.3% |
| Union County, Ohio | 3,376 | 10.6% | 1,998,335 | 30.3 min | 10.4% |
| Wyandot County, Ohio | 2,439 | 19.6% | 997,623 | 33.7 min | 8.0% |
| Delaware County, Ohio | 6,269 | 8.3% | 5,148,498 | 29.3 min | 16.9% |
| Morrow County, Ohio | 3,269 | 16.7% | 1,578,593 | 35.2 min | 10.2% |
| Ohio average | 5,773 | 9.9% | N/A | 32.9 min | 16.5% |
No other county-level area in Ohio records a higher average travel time than Marion County.
| Measure | Marion County | Ohio rank |
|---|---|---|
| Traffic volume (AADT) | 4,615 | #21 of 88 |
| Highway vehicle-miles per day | 442,818 | #58 of 83 |
| Truck share on highways | 18.9% | #36 of 83 |
| Highway trucks per day | 2,022 | #37 of 83 |
| Average travel time | 43.6 min | #1 of 88 |
| Average driver income | $68,188 | #53 of 88 |
| Average driver age | 48.5 yrs | #56 of 88 |
On their busiest stretches, the three busiest roads in Marion County carry 19,628 vehicles a day on average, 4.3 times the typical road in the county (4,615).
US 23 is the busiest road, at 26,273 vehicles a day, 3,400 of them trucks (12.9%). It tops the truck ranking too, with the most trucks.
Few trucks use Delaware Avenue: 3.7% of its traffic, under half the county's 10.9%.
US 23 draws drivers from wealthier areas: their neighborhoods average $88,898 in household income, 30% above the county's $68,188, while those on Main Street average $48,810, 28% below it.
Traffic and freight follow different roads here: only 2 of the five busiest roads also make the top 5 for trucks.
US 23 carries through traffic: the median trip using it lasts 58.8 minutes, against 43.6 for the county.
The busiest stretch of Mt Vernon Avenue carries 3.9 times the county average; trucks are 4.5% of it, below the county-wide 10.9%.
Travel on Delaware Avenue's busiest stretch runs 34% over free-flow time, against 14% across the county, so expect slower peak hours.
On its busiest stretch, Main Street carries 2.3 times the county average; trucks are 3.5% of it, below the county-wide 10.9%.
Center Street is one of the more congested roads here: trips take 29% longer than at free-flow speed, against 14% county-wide.
At 54% more than the county average, Harding Highway draws drivers from neighborhoods averaging $63,815 in household income.
Marion-Mt Gilead Road peaks at 9,008 vehicles a day, 2.0 times the county average; trucks are 6.9% of it, below the county-wide 10.9%.
SR 309 is busy by local standards, at 12% more than the county average on its busiest stretch; trucks are 10.3% of it, below the county-wide 10.9%.
The average monitored road in Marion carries 4,615 vehicles per day, 20% less than the Ohio average of 5,773.
Yes - at 43.6 minutes, Marion has the highest average travel time of any county in Ohio.
The average trip in Marion takes 43.6 minutes, 33% longer than the Ohio average of 32.9 minutes, delays at signals and congestion included.
Drivers on Marion roads have a median age of 48 years, and the median household income of the neighborhoods trips originate from averages $68,188, 20% below the Ohio average.
Approximately 45% of highway traffic and 6% of non-highway traffic consists of vehicles whose trip originates outside Marion County, Ohio. A sizeable share of highway traffic comes from outside, mixed with local trips on the same roads.
US 23 carries the most, 26,273 vehicles per day on its busiest stretch, followed by Mt Vernon Avenue (18,220), Delaware Avenue (14,392), Main Street (10,771), Center Street (10,056). Figures are AADT, both directions combined.
US 23, with about 3,400 trucks per day on its busiest stretch, 12.9% of its 26,273 vehicles.
About 26,273 vehicles per day in both directions on its busiest stretch, including 3,400 trucks (12.9%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases
The same traffic breakdown for the areas closest to Marion County, Ohio.
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