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Traffic heat map of Aiken County, South Carolina: 834 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 20 and Edgefield Road

Aiken County, South Carolina Traffic Counts

TrafficZoom tracks traffic on 834 road miles in Aiken County, South Carolina, divided into 9,894 segments averaging 445 ft. Its busiest road, I 20, carries 35,053 vehicles a day, 5.7 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Aiken County, South Carolina

Traffic

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

vehicles per day6,114
Trucks

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

11.2%
Average travel time

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

31.1 min
Congestion ratio

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

13.8%
Drivers’ average age

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

48.5 yrs
Drivers’ average income

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

$74,201

A typical monitored road in Aiken County, South Carolina sees 6,114 vehicles per day, while its 834 miles of monitored roads together handle 4,778,135 vehicle-miles traveled per day (≈1.7 billion per year). Trucks are 11.2% of traffic, more than the 9.5% across South Carolina.

Shorter trips than 98% of counties in South Carolina

Aiken's average daily traffic volume is 13% lower than the state average - 6,114 vehicles per day against 7,040 - a factor worth weighing in site selection and logistics planning. In total volume terms, its road network carries about 3.3% of South Carolina's statewide total of vehicle-miles. By volume, Aiken's 6,114 vehicles per day outpaces 73% of counties in South Carolina.

The average trip takes 31.1 minutes, 7% lower than the state level. 98% of counties in South Carolina have a longer average travel time than Aiken's 31.1 minutes.

The congestion ratio of 13.8% is 24% lower, pointing to smoother traffic flow than the state level - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Aiken County, South Carolina

Trafficvehicles per day11,220
Trucks19.0%
Average travel time38.7 min
Congestion ratio19.2%
Drivers’ average age47.4 yrs
Drivers’ average income$76,121

Highways carry a significant share of travel in Aiken County, South Carolina: 38% of all vehicle-miles. The average highway carries 11,220 vehicles per day, 94% more than the average non-highway road in the same area, which carries 5,781 vehicles per day.

With 15% of the road miles (127 miles in 606 segments), highways punch above their length, carrying 1,801,941 vehicle-miles traveled per day (≈658 million per year).

67% of counties in South Carolina move less traffic on their highways.

Higher highway truck share than 81% of counties in South Carolina

At 19.0%, highway truck share is 39% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

Aiken's highway truck share (19.0%) is higher than 81% of counties in South Carolina. 64% of counties in South Carolina see fewer highway trucks per day than Aiken's roughly 2,131.

non-highway traffic icon

Non-highway Traffic in Aiken County, South Carolina

Trafficvehicles per day5,781
Trucks6.5%
Average travel time30.6 min
Congestion ratio13.4%
Drivers’ average age48.8 yrs
Drivers’ average income$73,540

A little more than half of the driving in Aiken County, South Carolina happens on local roads: 62% of all vehicle-miles. A typical local road sees 5,781 vehicles per day.

Local roads make up 85% of the monitored road miles (707 miles in 9,288 segments) but carry less than their share of travel: 2,976,194 vehicle-miles traveled per day (≈1.1 billion per year). About 1 in 15 vehicles on non-highway roads is a truck (6.5%).

Drivers from higher-income areas than 76% of counties in South Carolina

The concentration of trucks on non-highway roads is 66% lower than on highways.

At 21% lower than the state level, the non-highway congestion ratio of 13.4% signals easier movement on local roads.

Trip origins here have higher average income than 76% of counties in South Carolina. 62% of counties in South Carolina have a younger driver population than Aiken.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Aiken County, South Carolina, the peak hour concentrates about 7% of the day's traffic.

Aiken County vs. South Carolina Traffic Comparison

Aiken County's biggest difference from the South Carolina average is its highway truck share, 39% above it. Its truck share is also 18% above.

MetricAiken CountySouth Carolina averageDifference
Traffic6,1147,040-13.2%
Truck % (Total Traffic)11.2%9.5%+18.0%
Truck % (Highway)19.0%13.7%+38.7%
Avg. Travel Time31.1 min33.3 min-6.7%

How Aiken County compares

Aiken County has a higher truck share than any nearby county

Nothing in this table sets Aiken County sharply apart from the 4 areas nearest to it, though it has the third busiest roads of the five. Traffic volume here matches the areas around it, but more of that traffic is trucks - a difference in what routes through, not in how much.

Aiken County and the 4 nearest county-level areas by centroid distance, with the South Carolina average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Aiken County6,11411.2%4,778,13531.1 min13.8%
Barnwell County, South Carolina2,8218.0%457,24833.1 min8.4%
Edgefield County, South Carolina2,5727.7%595,19532.9 min8.9%
Lexington County, South Carolina9,1659.1%9,067,14031.5 min18.5%
Richmond County, Georgia8,9597.7%4,368,82329.7 min17.3%
South Carolina average7,0409.5%N/A33.3 min18.2%

Aiken County ranked within South Carolina

Average travel time places Aiken County #45 of 46 in South Carolina - the bottom quarter of the state.

Aiken County ranked among 46 county-level areas in South Carolina (1 = highest); measures without data in every county rank a smaller field, down to 43.
MeasureAiken CountySouth Carolina rank
Traffic volume (AADT)6,114#13 of 46
Highway vehicle-miles per day1,801,941#15 of 43
Truck share on highways19.0%#9 of 43
Highway trucks per day2,131#16 of 43
Average travel time31.1 min#45 of 46
Average driver income$74,201#12 of 46
Average driver age48.5 yrs#18 of 46

The two ends of this table sit far apart: #9 of 43 on truck share on highways, against #45 of 46 on average travel time.

Busiest roads in Aiken County, South Carolina

The three busiest roads in Aiken County average 29,179 vehicles a day, 4.8 times the county average of 6,114 across all its monitored roads.

I 20 is the busiest road, at 35,053 vehicles a day, 7,705 of them trucks (22.0%). It also carries the most trucks.

Trucks make up 22.0% of traffic on I 20 and 20.4% on Palmetto Parkway, against 11.2% across all roads in the county.

Trips using I 20 are long: a median of 48.7 minutes against 31.1 county-wide, the mark of a through route.

Traffic and freight follow different roads here: only 2 of the five busiest roads also make the top 5 for trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 20Motorway · 35,053vehicles7,705trucks · 22.0%
Road class
Motorway
Congestion ratio
32.9%
Median trip time
48.7 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$79,045

Travel on I 20's busiest stretch runs 33% over free-flow time, against 14% across the county, so expect slower peak hours.

2Edgefield RoadPrimary road · 27,520vehicles1,318trucks · 4.8%
Road class
Primary road
Congestion ratio
26.6%
Median trip time
29.2 min
Drivers’ median age
47.1 yrs
Drivers’ average income
$81,248

Edgefield Road peaks at 27,520 vehicles a day, 4.5 times the county average; trucks are 4.8% of it, below the county-wide 11.2%.

3Pine Log RoadPrimary road · 24,965vehicles1,252trucks · 5.0%
Road class
Primary road
Congestion ratio
54.0%
Median trip time
32.0 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$71,544

Pine Log Road is one of the more congested roads here: trips take 54% longer than at free-flow speed, against 14% county-wide.

4Whiskey RoadSecondary road · 20,441vehicles1,064trucks · 5.2%
Road class
Secondary road
Congestion ratio
29.8%
Median trip time
30.3 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$76,775

Whiskey Road carries 3.3 times the county average at its busiest, 1,064 of them trucks (5.2%, below the county-wide 11.2%).

5Jefferson Davis HighwayTrunk road · 20,419vehicles1,817trucks · 8.9%
Road class
Trunk road
Congestion ratio
23.9%
Median trip time
32.7 min
Drivers’ median age
49.0 yrs
Drivers’ average income
$75,130

Jefferson Davis Highway carries 3.3 times the county average on its busiest stretch, where the median trip lasts 32.7 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 20Motorway · #1 by traffic35,053vehicles7,705trucks · 22.0%
2Palmetto ParkwayMotorway · 13,107vehicles2,670trucks · 20.4%
Road class
Motorway
Congestion ratio
11.3%
Median trip time
34.4 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$74,630

At 2.1 times the county average, Palmetto Parkway draws drivers from neighborhoods averaging $74,630 in household income.

3Jefferson Davis HighwayTrunk road · #5 by traffic20,419vehicles1,817trucks · 8.9%
4Sand Bar Ferry RoadPrimary road · 16,947vehicles1,743trucks · 10.3%
Road class
Primary road
Median trip time
30.0 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$64,473

The busiest stretch of Sand Bar Ferry Road carries 2.8 times the county average; trucks are 10.3% of it, below the county-wide 11.2%.

5Aiken-Augusta HighwayTrunk road · 15,295vehicles1,364trucks · 8.9%
Road class
Trunk road
Congestion ratio
12.8%
Median trip time
28.2 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$71,950

On its busiest stretch, Aiken-Augusta Highway carries 2.5 times the county average; trucks are 8.9% of it, below the county-wide 11.2%.

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

AikenDepartment 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 Aiken County

The same traffic breakdown for the areas closest to Aiken County, South Carolina.

Need segment-level traffic data?

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