Charleston, South Carolina Traffic Data

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Total traffic

Traffic

Traffic

The average number of vehicles that travel each day over a mile of the road.

17004

Trucks

Trucks

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

2.2%

Average travel time

Average travel time

The average time of vehicle travel for all vehicles traveling over the county road network.

32.1 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time.

30.6%

Drivers’ average age

Drivers’ average age

Average age of drivers in vehicles traveling over the county road network.

43.2 yrs

Drivers’ average income

Drivers’ average income

Average income of drivers in vehicles traveling over the county road network.

$91,177

Average distance driven

Average distance driven

The mean length of a trip taken by drivers over the county road network.

7.1 mi
Estimated annual traffic volume: 6,206,460 vehicles. On average, approximately 1 in every 50 vehicles is a truck. Based on an average trip distance of 7.1 mi and an average travel time of 32.1 min, the estimated average travel speed is 13.3 mph. This reflects door-to-door average speed, including time stopped at traffic signals, in congestion, and at intersections.

Highway traffic

Traffic

Traffic

The average number of vehicles that travel each day over a mile of the road.

25237

Trucks

Trucks

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

5.7%

Average travel time

Average travel time

The average time of vehicle travel for all vehicles traveling over the county highway network.

33.7 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time.

54.9%

Drivers’ average age

Drivers’ average age

Average age of drivers in vehicles traveling over the county highway network.

43.9 yrs

Drivers’ average income

Drivers’ average income

Average income of drivers in vehicles traveling over the county highway network.

$90,653

Average distance driven

Average distance driven

The mean length of a trip taken by drivers over the county road network.

10.7 mi
Annual highway traffic is 9,211,505 vehicles, which is 58% more than non-highway traffic. Trucks make up 5.7% of highway traffic, which means there are approximately 1,438 daily trucks on highways within Charleston County, or an estimated 524,870 trucks per year.

Non-highway traffic

Traffic

Traffic

The average number of vehicles that travel each day over a mile of the road.

16008

Trucks

Trucks

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

1.5%

Average travel time

Average travel time

The average time of vehicle travel for all vehicles traveling over the county non-highway roads.

32.0 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time.

27.7%

Drivers’ average age

Drivers’ average age

Average age of drivers in vehicles traveling over the county non-highway roads.

43.1 yrs

Drivers’ average income

Drivers’ average income

Average income of drivers in vehicles traveling over the county non-highway roads.

$91,240

Average distance driven

Average distance driven

The mean length of a trip taken by drivers over the county non-highway roads.

6.6 mi
Non-highway average travel time is 32.0 min, which is 5% less than on highways. Average trip distance on non-highway roads is 6.6 mi, which is 38% less than on highways. The average age of non-highway drivers is 43.1 yrs, which is 2% less than on highways. The average income of non-highway drivers is $91,240, which is nearly the same as on highways.
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