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Traffic heat map of Fairfield County, South Carolina: 369 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 77 and SC 34

Fairfield County, South Carolina Traffic Counts

How busy are the roads of Fairfield County, South Carolina? We measure 369 road miles, divided into 2,825 segments, with multi-sourced, cross-verified mobile and sensor data. Its highways rank among the top 5 counties in South Carolina for trucks per day. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Fairfield County, South Carolina

Traffic

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

vehicles per day2,227
Trucks

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

16.4%
Average travel time

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

35.0 min
Congestion ratio

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

6.6%
Drivers’ average age

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

44.9 yrs
Drivers’ average income

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

$69,244

Our data shows 2,227 vehicles per day on the average road in Fairfield County, South Carolina, and 1,599,900 vehicle-miles traveled per day (≈584 million per year) across its 369 miles of monitored roads. About 1 in 6 vehicles is a truck, well above the 9.5% across South Carolina - a freight-heavy mix.

Quieter roads than 87% of counties in South Carolina

Fairfield sees 68% lower average daily traffic volume than the state average (2,227 vehicles per day against 7,040), suggesting less demand on each road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 1.1% of South Carolina's statewide total of vehicle-miles. Fairfield carries less traffic than 87% of counties in South Carolina.

At 35.0 minutes, the average travel time is 5% higher than the state level. On travel time, Fairfield runs longer than 64% of counties in South Carolina.

The congestion ratio of 6.6% is 63% lower, pointing to smoother traffic flow than the state level - delays are rare enough to plan travel times almost to the minute.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Fairfield County, South Carolina

Trafficvehicles per day21,869
Trucks20.6%
Average travel time64.6 min
Congestion ratio48.4%
Drivers’ average age43.4 yrs
Drivers’ average income$78,736

Highways carry more than half of all travel in Fairfield County, South Carolina (69% of vehicle-miles). The average highway carries 21,869 vehicles per day, 1072% more than the average non-highway road in the same area, which carries 1,866 vehicles per day.

Yet highways are only 13% of the road network, 46 miles in 51 segments, so each mile of them is 5.5 times as busy as the average road mile.

More highway trucks than 93% of counties in South Carolina

At 20.6%, highway truck share is 50% higher than the state average. That marks Fairfield as a major freight corridor, where highway access is what logistics operators compete on.

90% of counties in South Carolina see a lower highway truck share than Fairfield's 20.6%. 93% of counties in South Carolina see fewer highway trucks per day than Fairfield's roughly 4,498.

non-highway traffic icon

Non-highway Traffic in Fairfield County, South Carolina

Trafficvehicles per day1,866
Trucks7.5%
Average travel time34.5 min
Congestion ratio5.9%
Drivers’ average age49.8 yrs
Drivers’ average income$60,866

A significant share of driving in Fairfield County, South Carolina, 31% of vehicle-miles, happens on local roads. The average non-highway road carries 1,866 vehicles per day.

Spread over 323 miles and 2,774 segments, 87% of the road network, local roads carry a lighter load per mile: 503,758 vehicle-miles traveled per day (≈184 million per year). The truck share on non-highway roads is 7.5%.

Younger drivers than 87% of counties in South Carolina

Compared to highways, non-highway routes see 64% fewer trucks by share.

At 65% lower than the state level, the non-highway congestion ratio of 5.9% signals easier movement on local roads.

Trip origins here have higher average income than 62% of counties in South Carolina. 87% of counties in South Carolina have an older driver population than Fairfield.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Fairfield County vs. South Carolina Traffic Comparison

Of the four measures, truck share differs most: Fairfield County runs 73% above the South Carolina average. Its average daily traffic per road, by contrast, is 68% below.

MetricFairfield CountySouth Carolina averageDifference
Traffic2,2277,040-68.4%
Truck % (Total Traffic)16.4%9.5%+73.1%
Truck % (Highway)20.6%13.7%+50.3%
Avg. Travel Time35.0 min33.3 min+5.2%

How Fairfield County compares

Fairfield County has the quietest roads among its nearby counties

Compared with its 4 closest neighbours, Fairfield County carries 63.9% less traffic on a typical road and is 50.2% less congested; it has the quietest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Fairfield 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
Fairfield County2,22716.4%1,599,90035.0 min6.6%
Chester County, South Carolina2,97115.7%1,901,34435.6 min7.4%
Richland County, South Carolina9,6868.4%10,314,23032.7 min20.6%
Lexington County, South Carolina9,1659.1%9,067,14031.5 min18.5%
Newberry County, South Carolina2,87313.1%2,004,13235.9 min6.9%
South Carolina average7,0409.5%N/A33.3 min18.2%

Fairfield County ranked within South Carolina

Highway truck volume places Fairfield County #4 of 43 in South Carolina - the top quarter of the state.

Fairfield 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.
MeasureFairfield CountySouth Carolina rank
Traffic volume (AADT)2,227#40 of 46
Highway vehicle-miles per day1,096,143#25 of 43
Truck share on highways20.6%#5 of 43
Highway trucks per day4,498#4 of 43
Average travel time35.0 min#17 of 46
Average driver income$69,244#18 of 46
Average driver age44.9 yrs#40 of 46

The two ends of this table sit far apart: #4 of 43 on highway truck volume, against #40 of 46 on average daily traffic volume.

Busiest roads in Fairfield County, South Carolina

Traffic concentrates on a few corridors: the three busiest roads average 20,180 vehicles a day, against 2,227 on the average road in Fairfield County.

I 77 leads with 46,712 vehicles a day, 9,609 of them trucks (20.6%). That is 5.7 times the next road, SC 34 (8,184). It tops the truck ranking too, with the most trucks on the list.

I 77 carries longer journeys than most roads here, with a median trip of 64.6 minutes against 35.0 county-wide.

Congress Street draws drivers from lower-income areas: their neighborhoods average $45,610 in household income, 34% below the county's $69,244.

Few trucks use Congress Street: 5.4% of its traffic, under half the county's 16.4%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 77Motorway · 46,712vehicles9,609trucks · 20.6%
Road class
Motorway
Congestion ratio
48.4%
Median trip time
64.6 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$78,736

I 77 is one of the more congested roads here: trips take 48% longer than at free-flow speed, against 7% county-wide.

2SC 34Secondary road · 8,184vehicles541trucks · 6.6%
Road class
Secondary road
Congestion ratio
15.6%
Median trip time
35.1 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$56,634

Delays build on SC 34: its congestion ratio of 16% over free-flow time is well above the county's 7%.

3Congress StreetPrimary road · 5,642vehicles304trucks · 5.4%
Road class
Primary road
Congestion ratio
14.7%
Median trip time
30.3 min
Drivers’ median age
49.1 yrs
Drivers’ average income
$45,610

Congress Street peaks at 5,642 vehicles a day, 2.5 times the county average; trucks are 5.4% of it, below the county-wide 16.4%.

4Wilson BoulevardPrimary road · 4,868vehicles354trucks · 7.3%
Road class
Primary road
Median trip time
29.7 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$75,890

Wilson Boulevard carries 2.2 times the county average at its busiest, 354 of them trucks (7.3%, below the county-wide 16.4%).

5Columbia RoadPrimary road · 4,810vehicles239trucks · 5.0%
Road class
Primary road
Congestion ratio
11.7%
Median trip time
28.5 min
Drivers’ median age
48.7 yrs
Drivers’ average income
$48,971

Columbia Road carries 2.2 times the county average on its busiest stretch, where the median trip lasts 28.5 minutes.

Ranked by trucks per day

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1I 77Motorway · #1 by traffic46,712vehicles9,609trucks · 20.6%
2SC 34Secondary road · #2 by traffic8,184vehicles541trucks · 6.6%
3Dogwood AvenueSecondary road · 4,393vehicles480trucks · 10.9%
Road class
Secondary road
Congestion ratio
10.7%
Median trip time
43.8 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$68,688

At 2.0 times the county average, Dogwood Avenue draws drivers from neighborhoods averaging $68,688 in household income.

4Palmer StreetPrimary road · 3,730vehicles471trucks · 12.6%
Road class
Primary road
Median trip time
46.6 min
Drivers’ median age
51.6 yrs
Drivers’ average income
$72,684

Palmer Street carries through traffic: the median trip using it lasts 46.6 minutes, against 35.0 for the county.

5Winnsboro RoadPrimary road · 4,161vehicles373trucks · 9.0%
Road class
Primary road
Median trip time
30.7 min
Drivers’ median age
50.3 yrs
Drivers’ average income
$70,703

Winnsboro Road carries 87% more than the county average on its busiest stretch, where the median trip lasts 30.7 minutes.

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

FairfieldDepartment 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 Fairfield County

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

Need segment-level traffic data?

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