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Traffic heat map of McCormick County, South Carolina: 158 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Mine Street and Gold Street

McCormick County, South Carolina Traffic Counts

Our McCormick County, South Carolina traffic data covers 1,234 road segments over 158 road miles, with an average segment of just 678 ft. Its drivers are the oldest of any county in South Carolina, a median 56 years. 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 McCormick County, South Carolina

Traffic

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

vehicles per day2,288
Trucks

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

8.9%
Average travel time

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

45.7 min
Congestion ratio

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

8.6%
Drivers’ average age

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

55.7 yrs
Drivers’ average income

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

$64,537

A typical monitored road in McCormick County, South Carolina sees 2,288 vehicles per day, while its 158 miles of monitored roads together handle 293,295 vehicle-miles traveled per day (≈107 million per year). Trucks are 8.9% of traffic, close to the 9.5% across South Carolina.

Longer trips than 96% of counties in South Carolina

McCormick sees 67% lower average daily traffic volume than the state average (2,288 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 0.2% of South Carolina's statewide total of vehicle-miles. 82% of counties in South Carolina see more traffic than McCormick's 2,288 vehicles per day.

At 45.7 minutes, the average travel time is 37% higher than the state level. On travel time, McCormick runs longer than 96% of counties in South Carolina.

Congestion runs 53% lower than the state level, at a ratio of 8.6%, which means smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In McCormick County, South Carolina, the peak hour concentrates about 8% of the day's traffic.

McCormick County vs. South Carolina Traffic Comparison

The average daily traffic per road sets McCormick County apart: 67% below the South Carolina average. Its average travel time, by contrast, is 37% above.

MetricMcCormick CountySouth Carolina averageDifference
Traffic2,2887,040-67.5%
Truck % (Total Traffic)8.9%9.5%-6.5%
Avg. Travel Time45.7 min33.3 min+37.2%

How McCormick County compares

Trips in McCormick County run longer than in any nearby county

Against the 4 nearest areas, McCormick County carries 60.8% less traffic on a typical road and moves 23.2% of the total daily travel; 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.

McCormick 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
McCormick County2,2888.9%293,29545.7 min8.6%
Lincoln County, Georgia1,7968.3%147,98535.3 min6.0%
Edgefield County, South Carolina2,5727.7%595,19532.9 min8.9%
Greenwood County, South Carolina7,1336.3%1,343,45933.4 min17.2%
Columbia County, Georgia11,8348.1%2,972,03928.3 min26.1%
South Carolina average7,0409.5%N/A33.3 min18.2%

McCormick County ranked within South Carolina

On average driver age, McCormick County tops the South Carolina field outright.

McCormick County ranked among 46 county-level areas in South Carolina (1 = highest).
MeasureMcCormick CountySouth Carolina rank
Traffic volume (AADT)2,288#38 of 46
Average travel time45.7 min#3 of 46
Average driver income$64,537#22 of 46
Average driver age55.7 yrs#1 of 46

McCormick County ranks #1 of 46 on average driver age but #38 of 46 on average daily traffic volume - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in McCormick County, South Carolina

Traffic concentrates on a few corridors: the three busiest roads average 5,213 vehicles a day, against 2,288 on the average road in McCormick County.

Mine Street is the busiest road, at 5,481 vehicles a day, 423 of them trucks (7.7%). Gold Street is practically level with it at 5,384. SC 28 carries the most trucks, 428 a day (9.0% of its traffic), although it ranks #3 for all traffic.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Mine StreetPrimary road · 5,481vehicles423trucks · 7.7%
Road class
Primary road
Congestion ratio
13.6%
Median trip time
47.0 min
Drivers’ median age
55.4 yrs
Drivers’ average income
$54,921

Mine Street peaks at 5,481 vehicles a day, 2.4 times the county average; trucks are 7.7% of it, below the county-wide 8.9%.

2Gold StreetPrimary road · 5,384vehicles330trucks · 6.1%
Road class
Primary road
Congestion ratio
12.0%
Median trip time
32.1 min
Drivers’ median age
61.0 yrs
Drivers’ average income
$52,090

Gold Street is a local road at heart: the median trip using it lasts 32.1 minutes, against 45.7 for the county.

3SC 28Primary road · 4,774vehicles428trucks · 9.0%
Road class
Primary road
Congestion ratio
11.7%
Median trip time
48.7 min
Drivers’ median age
52.4 yrs
Drivers’ average income
$68,675

SC 28 carries 2.1 times the county average at its busiest, 428 of them trucks (9.0%, in line with the county-wide 8.9%).

4US 378Primary road · 4,320vehicles340trucks · 7.9%
Road class
Primary road
Congestion ratio
11.3%
Median trip time
32.9 min
Drivers’ median age
62.4 yrs
Drivers’ average income
$60,617

Trips on US 378 are short, a median 32.9 minutes against 45.7 county-wide, so it mostly serves local errands and commutes.

5Main StreetPrimary road · 4,128vehicles384trucks · 9.3%
Road class
Primary road
Congestion ratio
5.4%
Median trip time
53.6 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$63,636

At 80% more than the county average, Main Street draws drivers from neighborhoods averaging $63,636 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1SC 28Primary road · #3 by traffic4,774vehicles428trucks · 9.0%
2Mine StreetPrimary road · #1 by traffic5,481vehicles423trucks · 7.7%
3Main StreetPrimary road · #5 by traffic4,128vehicles384trucks · 9.3%
4Greenwood HighwayPrimary road · 3,333vehicles343trucks · 10.3%
Road class
Primary road
Congestion ratio
8.0%
Median trip time
47.5 min
Drivers’ median age
55.8 yrs
Drivers’ average income
$62,798

Greenwood Highway is busy by local standards, at 46% more than the county average on its busiest stretch; trucks are 10.3% of it, above the county-wide 8.9%.

5US 378Primary road · #4 by traffic4,320vehicles340trucks · 7.9%
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

McCormickDepartment 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 McCormick County

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

Need segment-level traffic data?

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