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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day2,772 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 10.5% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 59.0 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 8.9% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 49.1 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $41,453 |
Our data shows 2,772 vehicles per day on the average road in Marlboro County, South Carolina, and 729,377 vehicle-miles traveled per day (≈266 million per year) across its 340 miles of monitored roads. Trucks are 10.5% of traffic, close to the 9.5% across South Carolina.
Marlboro sees 61% lower average daily traffic volume than the state average (2,772 vehicles per day against 7,040), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Marlboro accounts for about 0.5% of South Carolina's statewide total of vehicle-miles. Marlboro carries less traffic than 73% of counties in South Carolina.
The average trip takes 59.0 minutes, 77% higher than the state level. Marlboro additionally records the highest average travel time of any county in South Carolina - 59.0 minutes.
The congestion ratio of 8.9% is 51% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.
| Traffic | vehicles per day5,255 |
|---|---|
| Trucks | 12.1% |
| Average travel time | 45.2 min |
| Congestion ratio | 12.1% |
| Drivers’ average age | 48.3 yrs |
| Drivers’ average income | $41,295 |
A significant share of driving in Marlboro County, South Carolina, 38% of vehicle-miles, happens on highways. The average highway carries 5,255 vehicles per day, 136% more than the average non-highway road in the same area, which carries 2,229 vehicles per day.
With 17% of the road miles (60 miles in 427 segments), highways punch above their length, carrying 280,716 vehicle-miles traveled per day (≈102 million per year).
Highway truck concentration here runs 12% lower than the state average, at 12.1%. The highway traffic mix is typical for South Carolina: neither freight- nor commuter-dominated.
64% of counties in South Carolina see a higher highway truck share than Marlboro's 12.1%. By raw truck volume, Marlboro carries fewer highway trucks than 86% of counties in South Carolina.
| Traffic | vehicles per day2,229 |
|---|---|
| Trucks | 9.5% |
| Average travel time | 62.0 min |
| Congestion ratio | 8.2% |
| Drivers’ average age | 50.0 yrs |
| Drivers’ average income | $41,588 |
Local roads carry more than half of all travel in Marlboro County, South Carolina (62% of vehicle-miles). A typical local road sees 2,229 vehicles per day.
Local roads make up 83% of the monitored road miles (281 miles in 1,953 segments) but carry less than their share of travel: 448,661 vehicle-miles traveled per day (≈164 million per year). About 1 in 11 vehicles on non-highway roads is a truck (9.5%).
The concentration of trucks on non-highway roads is 21% lower than on highways.
At 52% lower than the state level, the non-highway congestion ratio of 8.2% signals easier movement on local roads.
At $41,453, the average driver income for trips originating here is the lowest in South Carolina. The driver population here skews older than 69% of counties in South Carolina.
The average travel time sets Marlboro County apart: 77% above the South Carolina average. Its average daily traffic per road, by contrast, is 61% below.
| Metric | Marlboro County | South Carolina average | Difference |
|---|---|---|---|
| Traffic | 2,772 | 7,040 | -60.6% |
| Truck % (Total Traffic) | 10.5% | 9.5% | +10.6% |
| Truck % (Highway) | 12.1% | 13.7% | -11.7% |
| Avg. Travel Time | 59.0 min | 33.3 min | +77.3% |
Compared with its 4 closest neighbours, Marlboro County sees 51.3% longer typical trips; it has the fourth busiest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Marlboro County | 2,772 | 10.5% | 729,377 | 59.0 min | 8.9% |
| Dillon County, South Carolina | 3,104 | 19.1% | 1,306,947 | 46.8 min | 9.0% |
| Scotland County, North Carolina | 3,989 | 9.9% | 960,247 | 43.3 min | 11.7% |
| Darlington County, South Carolina | 3,819 | 9.9% | 1,999,701 | 32.6 min | 11.5% |
| Chesterfield County, South Carolina | 2,616 | 9.7% | 1,092,835 | 33.2 min | 7.0% |
| South Carolina average | 7,040 | 9.5% | N/A | 33.3 min | 18.2% |
Marlboro County posts the highest average travel time of any county-level area in South Carolina.
| Measure | Marlboro County | South Carolina rank |
|---|---|---|
| Traffic volume (AADT) | 2,772 | #34 of 46 |
| Highway vehicle-miles per day | 280,716 | #38 of 43 |
| Truck share on highways | 12.1% | #28 of 43 |
| Highway trucks per day | 635 | #37 of 43 |
| Average travel time | 59.0 min | #1 of 46 |
| Average driver income | $41,453 | #46 of 46 |
| Average driver age | 49.1 yrs | #15 of 46 |
Marlboro County ranks #1 of 46 on average travel time but #46 of 46 on average driver income - the two describe the same roads and are worth reading together rather than either on its own.
On their busiest stretches, the three busiest roads in Marlboro County carry 16,370 vehicles a day on average, 5.9 times the typical road in the county (2,772).
I 95 leads with 23,339 vehicles a day, 5,705 of them trucks (24.4%). That is 78% more than the next road, US 1 (13,097). It tops the truck ranking too, with the most trucks.
Freight stands out on I 95: trucks are 24.4% of the traffic there, against 10.5% county-wide.
Blenheim Highway carries longer journeys than most roads here, with a median trip of 88.3 minutes against 59.0 county-wide.
Drivers on I 95 come from neighborhoods with an average household income of $57,722, 39% above the county average of $41,453.
I 95 carries 8.4 times the county average on its busiest stretch, where the median trip lasts 52.0 minutes.
US 1 is a local road at heart: the median trip using it lasts 41.0 minutes, against 59.0 for the county.
Travel on Broad Street's busiest stretch runs 31% over free-flow time, against 9% across the county, so expect slower peak hours.
US 15 carries 4.3 times the county average on its busiest stretch, where the median trip lasts 54.8 minutes.
Drivers on SC 38 are on long journeys, a median 85.9 minutes against 59.0 county-wide: a through route more than a local street.
At 3.4 times the county average, Blenheim Highway draws drivers from neighborhoods averaging $47,391 in household income.
The average monitored road in Marlboro carries 2,772 vehicles per day, 61% less than the South Carolina average of 7,040.
Yes - Marlboro has the lowest average driver income of any county in South Carolina, at $41,453.
Weekday traffic has two busy windows: AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 12:00 PM to 6:00 PM - about 70% above the daily average.
Approximately 27% of highway traffic and 13% of non-highway traffic consists of vehicles whose trip originates outside Marlboro County, South Carolina. Even highway traffic is mostly local, so these roads mainly serve residents and commuters.
The average trip in Marlboro takes 59.0 minutes, 77% longer than the South Carolina average of 33.3 minutes, delays at signals and congestion included.
I 95 carries the most, 23,339 vehicles per day on its busiest stretch, followed by US 1 (13,097), Broad Street (12,674), US 15 (11,920), SC 38 (10,760). Figures are AADT, both directions combined.
I 95, with about 5,705 trucks per day on its busiest stretch, 24.4% of its 23,339 vehicles.
About 23,339 vehicles per day in both directions on its busiest stretch, including 5,705 trucks (24.4%). 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 Marlboro County, South Carolina.
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