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Traffic heat map of Rockdale County, Georgia: 249 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 20 and McDonough Road

Rockdale County, Georgia Traffic Counts

Our Rockdale County, Georgia traffic data covers 7,275 road segments over 249 road miles, with an average segment of just 181 ft. Its busiest road, I 20, carries 95,190 vehicles a day, 13.1 times the average road. 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 Rockdale County, Georgia

Traffic

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

vehicles per day7,270
Trucks

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

8.9%
Average travel time

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

32.4 min
Congestion ratio

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

18.4%
Drivers’ average age

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

45.5 yrs
Drivers’ average income

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

$81,361

The average monitored road in Rockdale County, Georgia carries 7,270 vehicles per day. Across its 249 miles of monitored roads, that adds up to 2,575,904 vehicle-miles traveled per day (≈940 million per year). Trucks are 8.9% of traffic, close to the 9.7% across Georgia.

Busier roads than 85% of counties in Georgia

Rockdale's average daily traffic volume of 7,270 vehicles per day is on par with the state average of 7,398. In total volume terms, its road network carries about 0.9% of Georgia's statewide total of vehicle-miles. Rockdale carries more traffic than 85% of counties in Georgia.

The average trip takes 32.4 minutes, on par with the state level. Its average travel time of 32.4 minutes is shorter than 63% of counties in Georgia.

Congestion is somewhat higher than the state level, at a ratio of 18.4% (9% higher).

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Rockdale County, Georgia

Trafficvehicles per day16,145
Trucks12.8%
Average travel time39.0 min
Congestion ratio28.2%
Drivers’ average age45.4 yrs
Drivers’ average income$79,237

Travel in Rockdale County, Georgia splits roughly evenly, with about half of it (52% of vehicle-miles) on highways. The average highway carries 16,145 vehicles per day, 151% more than the average non-highway road in the same area, which carries 6,420 vehicles per day.

With 18% of the road miles (44 miles in 636 segments), highways punch above their length, carrying 1,327,866 vehicle-miles traveled per day (≈485 million per year).

81% of counties in Georgia move less traffic on their highways.

More highway trucks than 85% of counties in Georgia

At 12.8%, highway truck share is 5% lower than the state average. The highway traffic mix is typical for Georgia: neither freight- nor commuter-dominated.

52% of counties in Georgia see a higher highway truck share than Rockdale's 12.8%. Rockdale's highway truck count is higher than 85% of counties in Georgia, at roughly 2,071 trucks per day.

non-highway traffic icon

Non-highway Traffic in Rockdale County, Georgia

Trafficvehicles per day6,420
Trucks4.7%
Average travel time31.8 min
Congestion ratio17.5%
Drivers’ average age45.5 yrs
Drivers’ average income$83,193

Travel in Rockdale County, Georgia splits roughly evenly, with about half of it (48% of vehicle-miles) on local roads. A typical local road sees 6,420 vehicles per day.

Spread over 205 miles and 6,639 segments, 82% of the road network, local roads carry a lighter load per mile: 1,248,038 vehicle-miles traveled per day (≈456 million per year). About 1 in 21 vehicles on non-highway roads is a truck (4.7%).

Drivers from higher-income areas than 84% of counties in Georgia

Compared to highways, non-highway routes see 63% fewer trucks by share.

Non-highway congestion (17.5%) runs slightly higher than the state level (8% higher).

Rockdale's average driver income is higher than 84% of counties in Georgia. The driver population here skews younger than 66% of counties in Georgia.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Rockdale County, Georgia, the peak hour concentrates about 7% of the day's traffic.

Rockdale County vs. Georgia Traffic Comparison

Rockdale County stays close to the Georgia average; the largest gap is its truck share, 8% below.

MetricRockdale CountyGeorgia averageDifference
Traffic7,2707,398-1.7%
Truck % (Total Traffic)8.9%9.7%-8.1%
Truck % (Highway)12.8%13.6%-5.5%
Avg. Travel Time32.4 min33.6 min-3.4%

How Rockdale County compares

Rockdale County against nearby counties

Against the 4 nearest areas, Rockdale County moves 36.0% of the total daily travel; it has the third busiest roads of the five.

Rockdale County and the 4 nearest county-level areas by centroid distance, with the Georgia average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Rockdale County7,2708.9%2,575,90432.4 min18.4%
Newton County, Georgia6,85110.7%2,587,27830.4 min20.7%
Walton County, Georgia6,4637.2%2,041,22231.8 min17.7%
DeKalb County, Georgia14,1777.9%17,970,15834.7 min27.0%
Henry County, Georgia7,8929.6%5,998,35532.0 min18.9%
Georgia average7,3989.7%N/A33.6 min16.8%

Rockdale County ranked within Georgia

Rockdale County sits in the top quarter of the Georgia field on average daily traffic volume, at #24 of 159.

Rockdale County ranked among 159 county-level areas in Georgia (1 = highest); measures without data in every county rank a smaller field, down to 147.
MeasureRockdale CountyGeorgia rank
Traffic volume (AADT)7,270#24 of 159
Highway vehicle-miles per day1,327,866#29 of 147
Truck share on highways12.8%#76 of 147
Highway trucks per day2,071#23 of 147
Average travel time32.4 min#101 of 159
Average driver income$81,361#27 of 159
Average driver age45.5 yrs#105 of 159

Busiest roads in Rockdale County, Georgia

The three busiest roads in Rockdale County average 57,534 vehicles a day, 7.9 times the county average of 7,270 across all its monitored roads.

I 20 leads with 95,190 vehicles a day, 14,160 of them trucks (14.9%). That is 2.0 times the next road, McDonough Road (46,644). It also carries the most trucks.

Freight stands out on I 20: trucks are 14.9% of the traffic there, against 8.9% county-wide.

Trips using I 20 are long: a median of 45.4 minutes against 32.4 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 20Motorway · 95,190vehicles14,160trucks · 14.9%
Road class
Motorway
Congestion ratio
62.8%
Median trip time
45.4 min
Drivers’ median age
44.9 yrs
Drivers’ average income
$76,447

Delays build on I 20: its congestion ratio of 63% over free-flow time is well above the county's 18%.

2McDonough RoadTrunk road · 46,644vehicles2,182trucks · 4.7%
Road class
Trunk road
Congestion ratio
34.9%
Median trip time
34.2 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$83,573

McDonough Road carries 6.4 times the county average on its busiest stretch, where the median trip lasts 34.2 minutes.

3Walnut Grove RoadTrunk road · 30,768vehicles2,064trucks · 6.7%
Road class
Trunk road
Congestion ratio
28.8%
Median trip time
38.1 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$81,374

Walnut Grove Road carries 4.2 times the county average at its busiest, 2,064 of them trucks (6.7%, below the county-wide 8.9%).

4Salem Road SoutheastSecondary road · 27,381vehicles994trucks · 3.6%
Road class
Secondary road
Congestion ratio
72.8%
Median trip time
29.2 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$75,895

Travel on Salem Road Southeast's busiest stretch runs 73% over free-flow time, against 18% across the county, so expect slower peak hours.

5McDonough HighwaySecondary road · 26,200vehicles1,000trucks · 3.8%
Road class
Secondary road
Congestion ratio
39.5%
Median trip time
31.7 min
Drivers’ median age
45.3 yrs
Drivers’ average income
$88,058

McDonough Highway carries 3.6 times the county average on its busiest stretch, where the median trip lasts 31.7 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 20Motorway · #1 by traffic95,190vehicles14,160trucks · 14.9%
2McDonough RoadTrunk road · #2 by traffic46,644vehicles2,182trucks · 4.7%
3Walnut Grove RoadTrunk road · #3 by traffic30,768vehicles2,064trucks · 6.7%
4GA 138Trunk road · 18,613vehicles1,622trucks · 8.7%
Road class
Trunk road
Congestion ratio
34.0%
Median trip time
41.5 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$85,033

At 2.6 times the county average, GA 138 draws drivers from neighborhoods averaging $85,033 in household income.

5Sigman Road SouthwestPrimary road · 20,280vehicles1,183trucks · 5.8%
Road class
Primary road
Congestion ratio
34.1%
Median trip time
36.0 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$75,749

The busiest stretch of Sigman Road Southwest carries 2.8 times the county average; trucks are 5.8% of it, below the county-wide 8.9%.

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

RockdaleDepartment 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 Rockdale County

The same traffic breakdown for the areas closest to Rockdale County, Georgia.

Need segment-level traffic data?

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