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Traffic heat map of York County, South Carolina: 698 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 77 and B. Bayles Mack Highway

York County, South Carolina Traffic Counts

How busy are the roads of York County, South Carolina? We measure 698 road miles, divided into 16,515 segments, with multi-sourced, cross-verified mobile and sensor data. Its drivers come from neighborhoods among the top 3 counties in South Carolina for household income. 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 York County, South Carolina

Traffic

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

vehicles per day8,536
Trucks

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

7.7%
Average travel time

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

33.4 min
Congestion ratio

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

18.1%
Drivers’ average age

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

45.7 yrs
Drivers’ average income

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

$92,379

A typical monitored road in York County, South Carolina sees 8,536 vehicles per day, while its 698 miles of monitored roads together handle 6,161,724 vehicle-miles traveled per day (≈2.2 billion per year). About 1 in 13 vehicles is a truck, fewer than the 1 in 11 across South Carolina.

Busier roads than 82% of counties in South Carolina

York sees 21% higher average daily traffic volume than the state average (8,536 vehicles per day against 7,040), suggesting more demand on each road - a factor worth weighing in site selection and logistics planning. Network-wide, York accounts for about 4.2% of South Carolina's statewide total of vehicle-miles. York carries more traffic than 82% of counties in South Carolina.

Journey times here (33.4 minutes on average) closely track the state level. On travel time, York runs shorter than 52% of counties in South Carolina.

At 18.1%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in York County, South Carolina

Trafficvehicles per day15,037
Trucks12.6%
Average travel time41.4 min
Congestion ratio26.7%
Drivers’ average age45.3 yrs
Drivers’ average income$84,900

Highways carry a significant share of travel in York County, South Carolina: 37% of all vehicle-miles. The average highway carries 15,037 vehicles per day, 86% more than the average non-highway road in the same area, which carries 8,101 vehicles per day.

Highways make up 14% of the monitored road miles (97 miles, 1,034 segments), so they carry more than their share: 2,281,221 vehicle-miles traveled per day (≈833 million per year).

By highway travel volume, York outranks 79% of counties in South Carolina.

More highway trucks than 71% of counties in South Carolina

The concentration of trucks on highways (12.6%) is 8% lower than the state average for similar road classifications. The highway traffic mix is typical for South Carolina: neither freight- nor commuter-dominated.

York's highway truck share (12.6%) is lower than 57% of counties in South Carolina. 71% of counties in South Carolina see fewer highway trucks per day than York's roughly 1,887.

non-highway traffic icon

Non-highway Traffic in York County, South Carolina

Trafficvehicles per day8,101
Trucks4.8%
Average travel time32.9 min
Congestion ratio17.5%
Drivers’ average age45.8 yrs
Drivers’ average income$94,599

A little more than half of the driving in York County, South Carolina happens on local roads: 63% of all vehicle-miles. The average non-highway road carries 8,101 vehicles per day.

Local roads make up 86% of the monitored road miles (601 miles in 15,481 segments) but carry less than their share of travel: 3,880,503 vehicle-miles traveled per day (≈1.4 billion per year). Trucks make up 4.8% of non-highway traffic, about 1 in 21 vehicles.

Drivers from higher-income areas than 98% of counties in South Carolina

Compared to highways, non-highway routes see 62% fewer trucks by share.

At 17.5%, the non-highway congestion ratio matches the state level closely.

York's average driver income is higher than 98% of counties in South Carolina. 80% of counties in South Carolina have an older driver population than York.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

York County vs. South Carolina Traffic Comparison

The average daily traffic per road sets York County apart: 21% above the South Carolina average. Its truck share, by contrast, is 19% below.

MetricYork CountySouth Carolina averageDifference
Traffic8,5367,040+21.2%
Truck % (Total Traffic)7.7%9.5%-19.2%
Truck % (Highway)12.6%13.7%-8.3%
Avg. Travel Time33.4 min33.3 min+0.4%

How York County compares

York County against nearby counties

Set against the average of the 4 areas nearest to it, York County runs 5.0 percentage points less truck traffic; it has the second busiest roads of the five. The extra traffic here is local and light - trucks make up less of it than anywhere immediately around it.

York 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
York County8,5367.7%6,161,72433.4 min18.1%
Gaston County, North Carolina8,0939.7%5,279,76333.9 min20.5%
Chester County, South Carolina2,97115.7%1,901,34435.6 min7.4%
Cherokee County, South Carolina2,94518.2%2,021,73733.3 min9.2%
Mecklenburg County, North Carolina12,2847.2%27,739,27232.2 min28.8%
South Carolina average7,0409.5%N/A33.3 min18.2%

York County ranked within South Carolina

York County sits in South Carolina's top three on average driver income.

York 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.
MeasureYork CountySouth Carolina rank
Traffic volume (AADT)8,536#9 of 46
Highway vehicle-miles per day2,281,221#10 of 43
Truck share on highways12.6%#25 of 43
Highway trucks per day1,887#13 of 43
Average travel time33.4 min#24 of 46
Average driver income$92,379#2 of 46
Average driver age45.7 yrs#37 of 46

The two ends of this table sit far apart: #2 of 46 on average driver income, against #37 of 46 on average driver age.

Busiest roads in York County, South Carolina

The three busiest roads in York County average 60,713 vehicles a day, 7.1 times the county average of 8,536 across all its monitored roads.

I 77 leads with 78,403 vehicles a day, 11,096 of them trucks (14.2%). It tops the truck ranking too, with the most trucks.

Freight stands out on I 77 and B. Bayles Mack Highway: trucks are 14.2% and 12.9% of the traffic there, against 7.7% county-wide.

I 77 carries longer journeys than most roads here, with a median trip of 44.3 minutes against 33.4 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 77Motorway · 78,403vehicles11,096trucks · 14.2%
Road class
Motorway
Congestion ratio
49.2%
Median trip time
44.3 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$89,495

I 77 is one of the more congested roads here: trips take 49% longer than at free-flow speed, against 18% county-wide.

2B. Bayles Mack HighwayMotorway · 65,035vehicles8,382trucks · 12.9%
Road class
Motorway
Congestion ratio
42.9%
Median trip time
39.3 min
Drivers’ median age
43.9 yrs
Drivers’ average income
$104,517

B. Bayles Mack Highway is a trunk route for the county, carrying 7.6 times the county average on its busiest stretch; trucks are 12.9% of it, above the county-wide 7.7%.

3Celanese RoadPrimary road · 38,700vehicles1,960trucks · 5.1%
Road class
Primary road
Congestion ratio
39.5%
Median trip time
34.6 min
Drivers’ median age
46.1 yrs
Drivers’ average income
$91,755

Celanese Road carries 4.5 times the county average at its busiest, 1,960 of them trucks (5.1%, below the county-wide 7.7%).

4Charlotte HighwayPrimary road · 35,458vehicles1,499trucks · 4.2%
Road class
Primary road
Congestion ratio
42.9%
Median trip time
28.9 min
Drivers’ median age
45.2 yrs
Drivers’ average income
$102,665

Charlotte Highway carries 4.2 times the county average on its busiest stretch, where the median trip lasts 28.9 minutes.

5US 21Primary road · 34,264vehicles1,738trucks · 5.1%
Road class
Primary road
Congestion ratio
48.5%
Median trip time
39.3 min
Drivers’ median age
46.3 yrs
Drivers’ average income
$103,229

Delays build on US 21: its congestion ratio of 48% over free-flow time is well above the county's 18%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 77Motorway · #1 by traffic78,403vehicles11,096trucks · 14.2%
2B. Bayles Mack HighwayMotorway · #2 by traffic65,035vehicles8,382trucks · 12.9%
3Celanese RoadPrimary road · #3 by traffic38,700vehicles1,960trucks · 5.1%
4Anderson RoadTrunk road · 22,926vehicles1,944trucks · 8.5%
Road class
Trunk road
Congestion ratio
28.6%
Median trip time
39.5 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$72,470

At 2.7 times the county average, Anderson Road draws drivers from neighborhoods averaging $72,470 in household income.

5Carowinds BoulevardPrimary road · 23,012vehicles1,796trucks · 7.8%
Road class
Primary road
Congestion ratio
13.7%
Median trip time
28.9 min
Drivers’ median age
44.1 yrs
Drivers’ average income
$113,718

The busiest stretch of Carowinds Boulevard carries 2.7 times the county average; trucks are 7.8% of it, in line with the county-wide 7.7%.

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

YorkDepartment 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 York County

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

Need segment-level traffic data?

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