This page delivers traffic analytics for South Carolina. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for South Carolina among 24,125 road miles divided in 376,802 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 338 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
7,040
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
9.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.3 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
18.2%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$73,901
Our data indicates an estimated average traffic volume of 7,040 vehicles per day in South Carolina that results in 146,996,561 vehicle-miles traveled per day (≈53.7 billion per year). The traffic stream is comprised of an average of 1 truck for every 11 vehicles. Typical time spent behind the wheel per trip is 33.3 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the US national averages: At 7,040 vehicles per day, the average road in South Carolina tracks closely with the national average of 6,986 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 146,996,561 vehicle-miles traveled per day (≈53.7 billion per year), roughly 1.9% of the national total. The average trip takes 33.3 minutes, on par with the national level. Congestion runs 4% lower than the national level, at a ratio of 18.2% - smoother traffic flow - crucial for traffic control improvement and logistics planning. By volume, South Carolina's 7,040 vehicles per day outpaces 64% of states nationwide. Its average travel time of 33.3 minutes is longer than 54% of states nationwide.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
15,257
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
13.7%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
38.8 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
33.4%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$73,619
A significant volume of traffic in South Carolina utilizes the highway network. The average highway carries 15,257 vehicles per day, 144% more than the average non-highway road in the same area, which carries 6,257 vehicles per day. That average covers 4,507 highway road miles divided in 32,806 segments (average segment length 725 ft), together carrying 72,609,074 vehicle-miles traveled per day (≈26.5 billion per year). That is more highway travel volume than 64% of states nationwide. Trucks constitute 13.7% of highway traffic.
Analytical insight
Highway truck concentration here runs 5% higher than the national average, at 13.7% - positioning South Carolina as a significant freight corridor. For logistics operators, this validates the importance of highway access. South Carolina's highway truck share (13.7%) is higher than 54% of states nationwide. By raw truck volume, South Carolina carries more highway trucks than 80% of states nationwide.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
6,257
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
5.4%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
32.8 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
16.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.0 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$74,530
The non-highway road network in South Carolina supports a substantial volume of traffic. The average non-highway road carries 6,257 vehicles per day, 59% less than the average highway in the same area, which carries 15,257 vehicles per day. That average covers 19,619 non-highway road miles divided in 343,996 segments (average segment length 301 ft), together carrying 74,387,491 vehicle-miles traveled per day (≈27.2 billion per year). Trucks constitute 5.4% of non-highway traffic.
Analytical insight
Non-highway roads carry a truck concentration that's 60% lower than the highway network. The non-highway congestion ratio of 16.9% is 8% lower than the national level, suggesting more efficient local mobility than the national average. South Carolina's overall average travel time exceeds 54% of states nationwide. 18% of states nationwide see lower average driver income among trip origins than South Carolina. 60% of states nationwide have a younger driver population than South Carolina.
Time-of-Day & Seasonal Patterns
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:
Weekend volumes run about 19% below weekday levels.
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -9% versus the annual average.
Analytical insight
In South Carolina, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +4% in high season.
Traffic Flow Profile Comparison
Metric
South Carolina
N/A
Average
Difference
Traffic
7,040
6,986
+0.8%
Truck % (Total Traffic)
9.5%
9.3%
+1.6%
Truck % (Highway)
13.7%
13.1%
+4.7%
Avg. Travel Time
33.3 min
33.3 min
-0.1%
How South Carolina compares
South Carolina against nearby states
Nothing in this table sets South Carolina sharply apart from the 4 states nearest to it, though it has the third busiest roads of the five. The same kind of road, just less of it: traffic per road matches the states around it while the network itself is smaller.
South Carolina and the 4 nearest states by centroid distance, with the United States average for scale.
Together, those three counties carry 23.0% of all the vehicle-miles measured in the state.
Ranked by daily vehicle-miles, across the 46 counties in South Carolina with a published traffic page. Vehicle-miles is total travel, so this ranks by traffic MOVED rather than by how busy a typical road is.
The average daily traffic volume is calculated at 7,040 vehicles per day, providing a baseline for daily operations and site assessment.
Trip origins in South Carolina have higher average income than 18% of states nationwide.
Trucks account for approximately 9.5% of the total traffic mix across all road types, with a significantly higher concentration of 13.7% on highways.
The average travel time for drivers is 33.3 minutes, offering a standard metric for commute and delivery route planning.
Traffic volumes are typically 4% higher during April–June. Volumes drop to their lowest levels in January, averaging 6,413 vehicles per day - a 9% decrease from the annual average.
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)
