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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day3,751 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 20.8% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 28.4 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 14.4% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 44.3 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $66,013 |
Our data shows 3,751 vehicles per day on the average road in Simpson County, Kentucky, and 842,754 vehicle-miles traveled per day (≈308 million per year) across its 178 miles of monitored roads. About 1 in 5 vehicles is a truck, well above the 12.1% across Kentucky - a freight-heavy mix.
Simpson's average daily traffic volume is 20% lower than the state average - 3,751 vehicles per day against 4,696 - suggesting less traffic load per road - a critical factor for logistics and site planning. In total volume terms, its road network carries about 0.7% of Kentucky's statewide total of vehicle-miles. 77% of counties in Kentucky see less traffic than Simpson's 3,751 vehicles per day.
The average trip takes 28.4 minutes, 10% lower than the state level. 86% of counties in Kentucky have a longer average travel time than Simpson's 28.4 minutes.
At 14.4%, the congestion ratio matches the state level closely.
| Traffic | vehicles per day17,588 |
|---|---|
| Trucks | 29.3% |
| Average travel time | 58.6 min |
| Congestion ratio | 28.0% |
| Drivers’ average age | 42.2 yrs |
| Drivers’ average income | $70,778 |
Highways carry more than half of all travel in Simpson County, Kentucky (61% of vehicle-miles). The average highway carries 17,588 vehicles per day, 390% more than the average non-highway road in the same area, which carries 3,586 vehicles per day.
That comes from just 15% of the monitored road miles: 27 miles in 34 segments, carrying 515,352 vehicle-miles traveled per day (≈188 million per year).
61% of counties in Kentucky move less traffic on their highways.
The concentration of trucks on highways (29.3%) is 85% higher than the state average for similar road classifications. That marks Simpson as a major freight corridor, where highway access is what logistics operators compete on.
By share, Simpson has the highest highway truck concentration in Kentucky, at 29.3%. 97% of counties in Kentucky see fewer highway trucks per day than Simpson's roughly 5,158.
| Traffic | vehicles per day3,586 |
|---|---|
| Trucks | 7.5% |
| Average travel time | 28.1 min |
| Congestion ratio | 14.2% |
| Drivers’ average age | 44.8 yrs |
| Drivers’ average income | $63,187 |
Local roads carry a significant share of travel in Simpson County, Kentucky: 39% of all vehicle-miles. On the average non-highway road, that comes to 3,586 vehicles per day.
Local roads make up 85% of the monitored road miles (151 miles in 2,857 segments) but carry less than their share of travel: 327,402 vehicle-miles traveled per day (≈120 million per year). The truck share on non-highway roads is 7.5%.
Non-highway roads carry a truck concentration that's 74% lower than the highway network.
The non-highway congestion ratio of 14.2% is in line with the state level.
Trip origins here have higher average income than 69% of counties in Kentucky. The driver population here skews younger than 96% of counties in Kentucky.
The highway truck share sets Simpson County apart: 85% above the Kentucky average. Its truck share is also 73% above.
| Metric | Simpson County | Kentucky average | Difference |
|---|---|---|---|
| Traffic | 3,751 | 4,696 | -20.1% |
| Truck % (Total Traffic) | 20.8% | 12.1% | +72.9% |
| Truck % (Highway) | 29.3% | 15.9% | +84.8% |
| Avg. Travel Time | 28.4 min | 31.7 min | -10.3% |
Compared with its 4 closest neighbours, Simpson County runs 10.4 percentage points more truck traffic and moves 38.4% of the total daily travel; it has the third busiest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Simpson County | 3,751 | 20.8% | 842,754 | 28.4 min | 14.4% |
| Logan County, Kentucky | 1,926 | 10.0% | 743,646 | 33.0 min | 6.3% |
| Warren County, Kentucky | 7,049 | 14.8% | 4,012,359 | 32.1 min | 19.7% |
| Allen County, Kentucky | 2,660 | 9.4% | 480,899 | 28.8 min | 11.1% |
| Sumner County, Tennessee | 9,493 | 7.7% | 3,544,575 | 30.2 min | 20.9% |
| Kentucky average | 4,696 | 12.1% | N/A | 31.7 min | 14.7% |
On truck share on highways, Simpson County tops the Kentucky field outright.
| Measure | Simpson County | Kentucky rank |
|---|---|---|
| Traffic volume (AADT) | 3,751 | #28 of 120 |
| Highway vehicle-miles per day | 515,352 | #45 of 115 |
| Truck share on highways | 29.3% | #1 of 115 |
| Highway trucks per day | 5,158 | #4 of 115 |
| Average travel time | 28.4 min | #103 of 120 |
| Average driver income | $66,013 | #38 of 120 |
| Average driver age | 44.3 yrs | #115 of 120 |
Simpson County ranks #1 of 115 on truck share on highways but #115 of 120 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.
Traffic concentrates on a few corridors: the three busiest roads average 20,238 vehicles a day, against 3,751 on the average road in Simpson County.
I 65 leads with 37,564 vehicles a day, 11,017 of them trucks (29.3%). No other road comes close: Main Street, in second place, carries 12,367. It also carries the most trucks.
Trips using I 65 are long: a median of 58.6 minutes against 28.4 county-wide, the mark of a through route.
Main Street is busy with cars rather than freight: only 5.1% of its traffic is trucks, against 20.8% county-wide.
Travel on I 65's busiest stretch runs 28% over free-flow time, against 14% across the county, so expect slower peak hours.
Main Street is one of the more congested roads here: trips take 29% longer than at free-flow speed, against 14% county-wide.
On its busiest stretch, KY 100 carries 2.9 times the county average; trucks are 6.3% of it, below the county-wide 20.8%.
Nashville Road peaks at 9,380 vehicles a day, 2.5 times the county average; trucks are 9.2% of it, below the county-wide 20.8%.
Bowling Green Road carries 2.2 times the county average at its busiest, 723 of them trucks (8.8%, below the county-wide 20.8%).
The average monitored road in Simpson carries 3,751 vehicles per day, 20% less than the Kentucky average of 4,696.
Yes - Simpson has the highest highway truck share of any county in Kentucky, at 29.3%.
The average trip in Simpson takes 28.4 minutes, 10% shorter than the Kentucky average of 31.7 minutes, delays at signals and congestion included.
Weekday traffic has two busy windows: AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 3:00 PM to 7:00 PM - about 64% above the daily average.
Trucks make up about 20.8% of all traffic in Simpson County, Kentucky, rising to 29.3% on highways, where long-haul freight concentrates.
Approximately 74% of highway traffic and 16% of non-highway traffic consists of vehicles whose trip originates outside Simpson County, Kentucky. Most highway traffic here starts elsewhere, so the highways serve the wider region more than the local community.
Drivers on Simpson roads have a median age of 44 years, and the median household income of the neighborhoods trips originate from averages $66,013, 8% below the Kentucky average.
I 65 carries the most, 37,564 vehicles per day on its busiest stretch, followed by Main Street (12,367), KY 100 (10,782), Nashville Road (9,380), Bowling Green Road (8,185). Figures are AADT, both directions combined.
I 65, with about 11,017 trucks per day on its busiest stretch, 29.3% of its 37,564 vehicles.
About 37,564 vehicles per day in both directions on its busiest stretch, including 11,017 trucks (29.3%). 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 Simpson County, Kentucky.
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