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Traffic heat map of Allendale County, South Carolina: 164 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 278 and Railroad Avenue

Allendale County, South Carolina Traffic Counts

Our Allendale County, South Carolina traffic data covers 1,122 road segments over 164 road miles, with an average segment of just 773 ft. Its roads are the quietest of any county in South Carolina, at 1,775 vehicles a day on average. 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 Allendale County, South Carolina

Traffic

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

vehicles per day1,775
Trucks

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

12.0%
Average travel time

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

40.5 min
Congestion ratio

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

5.9%
Drivers’ average age

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

49.1 yrs
Drivers’ average income

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

$41,525

The average monitored road in Allendale County, South Carolina carries 1,775 vehicles per day. Across its 164 miles of monitored roads, that adds up to 189,122 vehicle-miles traveled per day (≈69.0 million per year). At 12.0%, the truck share runs above the 9.5% across South Carolina: about 1 in 8 vehicles.

The quietest roads of any county in South Carolina

Allendale's average daily traffic volume is 75% lower than the state average - 1,775 vehicles per day against 7,040 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Across the whole network, that travel is about 0.1% of South Carolina's statewide total. Allendale stands out as having the lowest traffic volume in South Carolina - 1,775 vehicles per day.

At 40.5 minutes, the average travel time is 22% higher than the state level. 91% of counties in South Carolina have a shorter average travel time than Allendale's 40.5 minutes.

The congestion ratio of 5.9% is 68% 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 Allendale County, South Carolina

Trafficvehicles per day1,978
Trucks17.8%
Average travel time45.1 min
Congestion ratio3.8%
Drivers’ average age49.3 yrs
Drivers’ average income$42,222

At 18% of vehicle-miles, highways carry a smaller share of the traffic in Allendale County, South Carolina than local roads. The average highway carries 1,978 vehicles per day, 15% more than the average non-highway road in the same area, which carries 1,718 vehicles per day.

Highways also make up about 22% of the monitored road miles: 36 miles in 247 segments, together carrying 34,859 vehicle-miles traveled per day (≈12.7 million per year).

The fewest highway trucks of any county in South Carolina

The concentration of trucks on highways (17.8%) is 30% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

Allendale's highway truck share (17.8%) is higher than 71% of counties in South Carolina. Allendale also moves the lowest raw count of highway trucks in South Carolina, at roughly 174 per day.

non-highway traffic icon

Non-highway Traffic in Allendale County, South Carolina

Trafficvehicles per day1,718
Trucks10.6%
Average travel time39.2 min
Congestion ratio6.5%
Drivers’ average age49.1 yrs
Drivers’ average income$41,399

The vast majority of driving in Allendale County, South Carolina happens on local roads: 82% of all vehicle-miles. A typical local road sees 1,718 vehicles per day.

Local roads also make up about 78% of the monitored road miles: 129 miles in 875 segments, together carrying 154,262 vehicle-miles traveled per day (≈56.3 million per year). Trucks make up 10.6% of non-highway traffic, about 1 in 9 vehicles.

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

The concentration of trucks on non-highway roads is 40% lower than on highways.

Non-highway congestion (6.5%) runs 61% lower than the state average, pointing to smoother local traffic flow.

98% of counties in South Carolina see higher average driver income among trip origins than Allendale. 71% of counties in South Carolina have a younger driver population than Allendale.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Allendale County vs. South Carolina Traffic Comparison

Allendale County's biggest difference from the South Carolina average is its average daily traffic per road, 75% below it. Its highway truck share, by contrast, is 30% above.

MetricAllendale CountySouth Carolina averageDifference
Traffic1,7757,040-74.8%
Truck % (Total Traffic)12.0%9.5%+25.9%
Truck % (Highway)17.8%13.7%+30.3%
Avg. Travel Time40.5 min33.3 min+21.8%

How Allendale County compares

Allendale County moves the least traffic of its nearby counties

Compared with its 4 closest neighbours, Allendale County moves 37.9% of the total daily travel and sees 20.6% longer typical trips; 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.

Allendale 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
Allendale County1,77512.0%189,12240.5 min5.9%
Hampton County, South Carolina2,78815.9%809,41332.2 min8.1%
Screven County, Georgia1,68811.8%407,98733.4 min7.9%
Bamberg County, South Carolina1,8209.7%319,44835.8 min5.1%
Barnwell County, South Carolina2,8218.0%457,24833.1 min8.4%
South Carolina average7,0409.5%N/A33.3 min18.2%

Allendale County ranked within South Carolina

Allendale County records the lowest average daily traffic volume and highway truck volume in South Carolina.

Allendale 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.
MeasureAllendale CountySouth Carolina rank
Traffic volume (AADT)1,775#46 of 46
Highway vehicle-miles per day34,859#42 of 43
Truck share on highways17.8%#13 of 43
Highway trucks per day353#43 of 43
Average travel time40.5 min#5 of 46
Average driver income$41,525#45 of 46
Average driver age49.1 yrs#14 of 46

Allendale County ranks #5 of 46 on average travel time but #46 of 46 on average daily traffic volume. Some of the longest trips in South Carolina on some of its emptiest roads - distance, not congestion, is what sets travel time here.

Busiest roads in Allendale County, South Carolina

Traffic concentrates on a few corridors: the three busiest roads average 6,687 vehicles a day, against 1,775 on the average road in Allendale County.

US 278 leads with 7,196 vehicles a day, 718 of them trucks (10.0%). It tops the truck ranking too, with the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 278Trunk road · 7,196vehicles718trucks · 10.0%
Road class
Trunk road
Congestion ratio
8.6%
Median trip time
45.1 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$35,072

US 278 carries 4.1 times the county average on its busiest stretch, where the median trip lasts 45.1 minutes.

2Railroad AvenuePrimary road · 6,641vehicles499trucks · 7.5%
Road class
Primary road
Congestion ratio
8.0%
Median trip time
35.8 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$38,888

At 3.7 times the county average, Railroad Avenue draws drivers from neighborhoods averaging $38,888 in household income.

3Allendale-Fairfax HighwayPrimary road · 6,225vehicles539trucks · 8.7%
Road class
Primary road
Congestion ratio
7.8%
Median trip time
34.5 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$42,670

The busiest stretch of Allendale-Fairfax Highway carries 3.5 times the county average; trucks are 8.7% of it, below the county-wide 12.0%.

4Allendale-Hampton HighwayPrimary road · 5,376vehicles511trucks · 9.5%
Road class
Primary road
Congestion ratio
12.9%
Median trip time
39.0 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$45,462

On its busiest stretch, Allendale-Hampton Highway carries 3.0 times the county average; trucks are 9.5% of it, below the county-wide 12.0%.

5Kings AvenuePrimary road · 3,292vehicles345trucks · 10.5%
Road class
Primary road
Congestion ratio
7.8%
Median trip time
48.4 min
Drivers’ median age
48.2 yrs
Drivers’ average income
$40,592

Kings Avenue carries 85% more than the county average at its busiest, 345 of them trucks (10.5%, below the county-wide 12.0%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 278Trunk road · #1 by traffic7,196vehicles718trucks · 10.0%
2Allendale-Fairfax HighwayPrimary road · #3 by traffic6,225vehicles539trucks · 8.7%
3Allendale-Hampton HighwayPrimary road · #4 by traffic5,376vehicles511trucks · 9.5%
4Railroad AvenuePrimary road · #2 by traffic6,641vehicles499trucks · 7.5%
5Bufords Bridge HighwayTrunk road · 2,871vehicles484trucks · 16.9%
Road class
Trunk road
Median trip time
51.3 min
Drivers’ median age
55.9 yrs
Drivers’ average income
$47,309

Bufords Bridge Highway carries 62% more than the county average on its busiest stretch, where the median trip lasts 51.3 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

AllendaleDepartment 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 Allendale County

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

Need segment-level traffic data?

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