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Traffic heat map of Greenville County, South Carolina: 1,090 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 85 and North Street

Greenville County, South Carolina Traffic Counts

Our Greenville County, South Carolina traffic data covers 37,404 road segments over 1,090 road miles, with an average segment of just 154 ft. It ranks among the top 3 counties in South Carolina for average daily traffic. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
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 Greenville County, South Carolina

Traffic

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

vehicles per day10,909
Trucks

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

6.4%
Average travel time

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

34.2 min
Congestion ratio

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

21.7%
Drivers’ average age

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

45.2 yrs
Drivers’ average income

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

$82,955

Our data shows 10,909 vehicles per day on the average road in Greenville County, South Carolina, and 11,852,078 vehicle-miles traveled per day (≈4.3 billion per year) across its 1,090 miles of monitored roads. About 1 in 16 vehicles is a truck, fewer than the 1 in 11 across South Carolina.

Busier roads than 96% of counties in South Carolina

Greenville sees 55% higher average daily traffic volume than the state average (10,909 vehicles per day against 7,040), suggesting more demand on each road - heavy exposure for roadside retail, and tight road space for deliveries. In total volume terms, its road network carries about 8.1% of South Carolina's statewide total of vehicle-miles. Greenville carries more traffic than 96% of counties in South Carolina.

Journey times here (34.2 minutes on average) closely track the state level. Its average travel time of 34.2 minutes is longer than 58% of counties in South Carolina.

Congestion runs 19% higher than the state level, at a ratio of 21.7%, which means more pronounced congestion - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Greenville County, South Carolina

Trafficvehicles per day23,201
Trucks9.7%
Average travel time39.5 min
Congestion ratio32.3%
Drivers’ average age45.4 yrs
Drivers’ average income$78,141

A significant share of driving in Greenville County, South Carolina, 40% of vehicle-miles, happens on highways. The average highway carries 23,201 vehicles per day, 134% more than the average non-highway road in the same area, which carries 9,897 vehicles per day.

With 19% of the road miles (208 miles in 2,846 segments), highways punch above their length, carrying 4,776,204 vehicle-miles traveled per day (≈1.7 billion per year).

No more than 4 other counties in South Carolina move more traffic on their highways.

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

The concentration of trucks on highways (9.7%) is 29% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

81% of counties in South Carolina see a higher highway truck share than Greenville's 9.7%. Greenville's highway truck count is higher than 55% of counties in South Carolina, at roughly 2,244 trucks per day.

non-highway traffic icon

Non-highway Traffic in Greenville County, South Carolina

Trafficvehicles per day9,897
Trucks4.2%
Average travel time33.8 min
Congestion ratio20.8%
Drivers’ average age45.2 yrs
Drivers’ average income$85,589

A little more than half of the driving in Greenville County, South Carolina happens on local roads: 60% of all vehicle-miles. The average non-highway road carries 9,897 vehicles per day.

Spread over 882 miles and 34,558 segments, 81% of the road network, local roads carry a lighter load per mile: 7,075,874 vehicle-miles traveled per day (≈2.6 billion per year). About 1 in 24 vehicles on non-highway roads is a truck (4.2%).

Drivers from higher-income areas than 91% of counties in South Carolina

The concentration of trucks on non-highway roads is 57% lower than on highways.

Non-highway congestion (20.8%) runs 23% higher than the state average, pointing to slower local traffic flow.

Trip origins here have higher average income than 91% of counties in South Carolina. 84% of counties in South Carolina have an older driver population than Greenville.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 74% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 27% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -9% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Greenville County, South Carolina, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+4% in high season).

Greenville County vs. South Carolina Traffic Comparison

Greenville County's biggest difference from the South Carolina average is its average daily traffic per road, 55% above it. Its truck share, by contrast, is 33% below.

MetricGreenville CountySouth Carolina averageDifference
Traffic10,9097,040+55.0%
Truck % (Total Traffic)6.4%9.5%-32.6%
Truck % (Highway)9.7%13.7%-29.4%
Avg. Travel Time34.2 min33.3 min+2.8%

How Greenville County compares

Greenville County has the busiest roads among its nearby counties

Against the 4 nearest areas, Greenville County carries 96.8% more traffic on a typical road and is 68.0% more congested; it has the busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Greenville 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
Greenville County10,9096.4%11,852,07834.2 min21.7%
Pickens County, South Carolina4,7175.4%2,443,95232.0 min12.3%
Spartanburg County, South Carolina7,92310.2%10,246,31632.7 min17.2%
Anderson County, South Carolina6,0369.6%5,801,47834.7 min13.2%
Laurens County, South Carolina3,49512.3%2,644,96236.8 min8.9%
South Carolina average7,0409.5%N/A33.3 min18.2%

Greenville County ranked within South Carolina

Greenville County sits in South Carolina's top three on average daily traffic volume.

Greenville 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.
MeasureGreenville CountySouth Carolina rank
Traffic volume (AADT)10,909#3 of 46
Highway vehicle-miles per day4,776,204#4 of 43
Truck share on highways9.7%#35 of 43
Highway trucks per day2,244#20 of 43
Average travel time34.2 min#20 of 46
Average driver income$82,955#5 of 46
Average driver age45.2 yrs#39 of 46

The two ends of this table sit far apart: #3 of 46 on average daily traffic volume, against #39 of 46 on average driver age.

Busiest roads in Greenville County, South Carolina

The three busiest roads in Greenville County average 70,726 vehicles a day, 6.5 times the county average of 10,909 across all its monitored roads.

I 85 leads with 108,332 vehicles a day, 12,370 of them trucks (11.4%). That is 2.0 times the next road, North Street (53,252). It also carries the most trucks.

Freight stands out on I 85: trucks are 11.4% of the traffic there, against 6.4% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 85Motorway · 108,332vehicles12,370trucks · 11.4%
Road class
Motorway
Congestion ratio
75.5%
Median trip time
44.0 min
Drivers’ median age
45.7 yrs
Drivers’ average income
$77,544

Travel on I 85's busiest stretch runs 75% over free-flow time, against 22% across the county, so expect slower peak hours.

2North StreetTrunk road · 53,252vehicles2,250trucks · 4.2%
Road class
Trunk road
Congestion ratio
51.7%
Median trip time
31.5 min
Drivers’ median age
45.0 yrs
Drivers’ average income
$79,155

North Street peaks at 53,252 vehicles a day, 4.9 times the county average; trucks are 4.2% of it, below the county-wide 6.4%.

3SC 14Primary road · 50,593vehicles3,448trucks · 6.8%
Road class
Primary road
Congestion ratio
41.6%
Median trip time
34.4 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$92,379

SC 14 carries 4.6 times the county average at its busiest, 3,448 of them trucks (6.8%, above the county-wide 6.4%).

4I 385Motorway · 48,058vehicles3,987trucks · 8.3%
Road class
Motorway
Congestion ratio
47.2%
Median trip time
36.3 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$83,742

I 385 carries 4.4 times the county average on its busiest stretch, where the median trip lasts 36.3 minutes.

5Stone AvenueTrunk road · 40,018vehicles1,751trucks · 4.4%
Road class
Trunk road
Congestion ratio
59.2%
Median trip time
35.0 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$77,297

Stone Avenue is one of the more congested roads here: trips take 59% longer than at free-flow speed, against 22% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 85Motorway · #1 by traffic108,332vehicles12,370trucks · 11.4%
2I 385Motorway · #4 by traffic48,058vehicles3,987trucks · 8.3%
3SC 14Primary road · #3 by traffic50,593vehicles3,448trucks · 6.8%
4Golden Strip FwyMotorway · 34,945vehicles3,280trucks · 9.4%
Road class
Motorway
Congestion ratio
50.1%
Median trip time
29.9 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$83,503

At 3.2 times the county average, Golden Strip Fwy draws drivers from neighborhoods averaging $83,503 in household income.

5Golden Strip FreewayMotorway · 40,002vehicles3,121trucks · 7.8%
Road class
Motorway
Congestion ratio
42.1%
Median trip time
29.1 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$87,873

The busiest stretch of Golden Strip Freeway carries 3.7 times the county average; trucks are 7.8% of it, above the county-wide 6.4%.

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

GreenvilleDepartment 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 Greenville County

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

Need segment-level traffic data?

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