This page delivers traffic analytics for Dorchester County, South Carolina. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Dorchester County, South Carolina among 429 road miles divided in 5,458 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 415 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.
10,615
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
11.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.2 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.
30.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
43.6 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$81,201
Our data indicates an estimated average traffic volume of 10,615 vehicles per day in Dorchester County, South Carolina that results in 3,816,720 vehicle-miles traveled per day (≈1.4 billion per year). The traffic stream is comprised of an average of 1 truck for every 9 vehicles. Typical time spent behind the wheel per trip is 35.2 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the South Carolina state averages: At 10,615 vehicles per day, the average monitored road in Dorchester carries 51% more traffic than the state average of 7,040 vehicles per day - a critical factor for logistics and site planning. Network-wide, Dorchester accounts for about 2.6% of South Carolina's statewide total, at 3,816,720 vehicle-miles traveled per day (≈1.4 billion per year). Journey times run 6% higher than the state level, at 35.2 minutes on average. At 70% higher than the state level, the 30.9% congestion ratio signals more pronounced congestion - crucial for traffic control improvement and logistics planning. 93% of counties in South Carolina see less traffic than Dorchester's 10,615 vehicles per day. 67% of counties in South Carolina have a shorter average travel time than Dorchester's 35.2 minutes.
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.
19,502
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
16.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
36.4 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.
45.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
43.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$82,063
A significant volume of traffic in Dorchester County, South Carolina utilizes the highway network. The average highway carries 19,502 vehicles per day, 95% more than the average non-highway road in the same area, which carries 10,014 vehicles per day. That average covers 91 highway road miles divided in 346 segments (average segment length 1,389 ft), together carrying 1,920,128 vehicle-miles traveled per day (≈701 million per year). That is more highway travel volume than 69% of counties in South Carolina. Trucks constitute 16.5% of highway traffic.
Analytical insight
At 16.5%, highway truck share is 21% higher than the state average, marking Dorchester as a significant freight corridor - underscoring the importance of highway access for logistics operators. Dorchester's highway truck share (16.5%) is higher than 67% of counties in South Carolina. 83% of counties in South Carolina see fewer highway trucks per day than Dorchester's roughly 3,226.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
10,014
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
5.3%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.1 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.
29.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
43.6 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$80,758
The non-highway road network in Dorchester County, South Carolina supports a substantial volume of traffic. The average non-highway road carries 10,014 vehicles per day, 49% less than the average highway in the same area, which carries 19,502 vehicles per day. That average covers 338 non-highway road miles divided in 5,112 segments (average segment length 349 ft), together carrying 1,896,592 vehicle-miles traveled per day (≈692 million per year). Trucks constitute 5.3% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 68% lower than on highways. At 78% higher than the state level, the non-highway congestion ratio of 29.9% signals more friction on local roads. 67% of counties in South Carolina see shorter overall travel times than Dorchester. 89% of counties in South Carolina see lower average driver income among trip origins than Dorchester. The driver population here skews older than 4% of counties in South Carolina.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 78% higher than the daily average.
Weekend traffic:
Weekend volumes run about 17% above weekday levels.
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +8% versus the annual average.
Lowest month:
September is the quietest month, with volumes -12% versus the annual average.
Analytical insight
In Dorchester County, South Carolina, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +8% in high season.
Traffic Flow Profile Comparison
Metric
Dorchester
South Carolina
Average
Difference
Traffic
10,615
7,040
+50.8%
Truck % (Total Traffic)
11.0%
9.5%
+15.6%
Truck % (Highway)
16.5%
13.7%
+20.8%
Avg. Travel Time
35.2 min
33.3 min
+5.6%
How Dorchester County compares
Dorchester County against nearby areas
Compared with its 4 closest neighbours, Dorchester County is 65.6% more congested; it has the second busiest roads of the five.
Dorchester County and the 4 nearest county-level areas by centroid distance, with the South Carolina average for scale.
Dorchester County sits in the bottom quarter of the South Carolina field on average driver age, at #44 of 46.
Where Dorchester County sits among South Carolina's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
Measure
Dorchester County
South Carolina rank
Traffic volume (AADT)
10,615
#4 of 46
Highway vehicle-miles per day
1,920,128
#14 of 43
Truck share on highways
16.5%
#15 of 43
Highway trucks per day
3,226
#8 of 43
Average travel time
35.2 min
#16 of 46
Average driver income
$81,201
#6 of 46
Average driver age
43.6 yrs
#44 of 46
Dorchester County ranks #4 of 46 on average daily traffic volume but #44 of 46 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.
Frequently Asked Questions
The average daily traffic volume is calculated at 10,615 vehicles per day, providing a baseline for daily operations and site assessment.
Dorchester carries more highway trucks by raw volume than 83% of counties in South Carolina, at roughly 3,226 per day.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 4:00 PM and 6:00 PM in the evening - about 78% above the daily average.
Traffic volumes are typically 8% higher during May–July. Volumes drop to their lowest levels in September, averaging 9,292 vehicles per day - a 12% decrease from the annual average.
Drivers on Dorchester roads have a median age of 44 years, and the median household income of the neighborhoods trips originate from averages $81,201 - useful context for retail siting and customer profiling.
The average travel time for drivers is 35.2 minutes, offering a standard metric for commute and delivery route planning.
Trucks account for approximately 11.0% of the total traffic mix across all road types, with a significantly higher concentration of 16.5% on highways.
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)
