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Traffic heat map of DeKalb County, Alabama: 482 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Glenn Boulevard Southwest

DeKalb County, Alabama Traffic Counts

Its busiest road, Glenn Boulevard Southwest, carries 20,950 vehicles a day, 5.6 times the average road. This page breaks down traffic in DeKalb County, Alabama across 482 miles of monitored roads split into 4,367 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 DeKalb County, Alabama

Traffic

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

vehicles per day3,746
Trucks

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

12.8%
Average travel time

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

32.5 min
Congestion ratio

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

11.3%
Drivers’ average age

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

48.1 yrs
Drivers’ average income

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

$55,176

The average monitored road in DeKalb County, Alabama carries 3,746 vehicles per day. Across its 482 miles of monitored roads, that adds up to 1,850,848 vehicle-miles traveled per day (≈676 million per year). At 12.8%, the truck share runs above the 10.6% across Alabama: about 1 in 8 vehicles.

Traffic 37% below the Alabama average

DeKalb's average daily traffic volume is 37% lower than the state average - 3,746 vehicles per day against 5,932 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, DeKalb accounts for about 1.3% of Alabama's statewide total of vehicle-miles. By volume, DeKalb's 3,746 vehicles per day outpaces 61% of counties in Alabama.

The average trip takes 32.5 minutes, on par with the state level. On travel time, DeKalb runs shorter than 55% of counties in Alabama.

Congestion runs 27% lower than the state level, at a ratio of 11.3%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in DeKalb County, Alabama

Trafficvehicles per day5,807
Trucks22.2%
Average travel time56.8 min
Drivers’ average age48.6 yrs
Drivers’ average income$55,269

A significant share of driving in DeKalb County, Alabama, 36% of vehicle-miles, happens on highways. The average highway carries 5,807 vehicles per day, 56% more than the average non-highway road in the same area, which carries 3,723 vehicles per day.

With 18% of the road miles (85 miles in 48 segments), highways punch above their length, carrying 669,550 vehicle-miles traveled per day (≈244 million per year).

Higher highway truck share than 92% of counties in Alabama

The concentration of trucks on highways (22.2%) is 50% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 92% of counties in Alabama. By raw truck volume, DeKalb carries more highway trucks than 59% of counties in Alabama.

non-highway traffic icon

Non-highway Traffic in DeKalb County, Alabama

Trafficvehicles per day3,723
Trucks7.5%
Average travel time32.2 min
Congestion ratio11.3%
Drivers’ average age48.1 yrs
Drivers’ average income$55,151

Local roads carry more than half of all travel in DeKalb County, Alabama (64% of vehicle-miles). The average non-highway road carries 3,723 vehicles per day.

Spread over 397 miles and 4,319 segments, 82% of the road network, local roads carry a lighter load per mile: 1,181,298 vehicle-miles traveled per day (≈431 million per year). Trucks make up 7.5% of non-highway traffic, about 1 in 13 vehicles.

Drivers from lower-income areas than 68% of counties in Alabama

Non-highway roads carry a truck concentration that's 66% lower than the highway network.

Non-highway congestion (11.3%) runs 24% lower than the state average, pointing to smoother local traffic flow.

68% of counties in Alabama see higher average driver income among trip origins than DeKalb. The driver population here skews older than 50% of counties in Alabama.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 79% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 23% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +2% versus the annual average.
Lowest month:
January is the quietest month, with volumes -8% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In DeKalb County, Alabama, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+2% in high season).

DeKalb County vs. Alabama Traffic Comparison

The highway truck share sets DeKalb County apart: 50% above the Alabama average. Its average daily traffic per road, by contrast, is 37% below.

MetricDeKalb CountyAlabama averageDifference
Traffic3,7465,932-36.9%
Truck % (Total Traffic)12.8%10.6%+20.6%
Truck % (Highway)22.2%14.8%+49.8%
Avg. Travel Time32.5 min31.8 min+2.1%

How DeKalb County compares

DeKalb County moves more traffic than any nearby county

Nothing in this table sets DeKalb County sharply apart from the 4 areas nearest to it, though it has the second busiest roads of the five. The same kind of road, simply more of it: traffic per road matches the areas around it while the network itself is larger.

DeKalb County and the 4 nearest county-level areas by centroid distance, with the Alabama average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
DeKalb County3,74612.8%1,850,84832.5 min11.3%
Dade County, Georgia3,55518.8%1,208,13332.2 min12.8%
Jackson County, Alabama2,84610.8%1,545,21934.4 min9.5%
Chattooga County, Georgia4,1617.7%421,36831.0 min10.2%
Cherokee County, Alabama2,7659.4%667,00034.2 min8.8%
Alabama average5,93210.6%N/A31.8 min15.5%

DeKalb County ranked within Alabama

DeKalb County sits in the top quarter of the Alabama field on truck share on highways, at #6 of 60.

DeKalb County ranked among 67 county-level areas in Alabama (1 = highest); measures without data in every county rank a smaller field, down to 60.
MeasureDeKalb CountyAlabama rank
Traffic volume (AADT)3,746#27 of 67
Highway vehicle-miles per day669,550#36 of 60
Truck share on highways22.2%#6 of 60
Highway trucks per day1,289#25 of 60
Average travel time32.5 min#37 of 67
Average driver income$55,176#46 of 67
Average driver age48.1 yrs#34 of 67

Busiest roads in DeKalb County, Alabama

The three busiest roads in DeKalb County average 20,019 vehicles a day, 5.3 times the county average of 3,746 across all its monitored roads.

Glenn Boulevard Southwest is the busiest road, at 20,950 vehicles a day, 1,406 of them trucks (6.7%). I 59 carries the most trucks, 3,497 a day (22.2% of its traffic), although it ranks #4 for all traffic.

Trips using I 59 are long: a median of 56.8 minutes against 32.5 county-wide, the mark of a through route.

Freight stands out on I 59: trucks are 22.2% of the traffic there, against 12.8% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Glenn Boulevard SouthwestPrimary road · 20,950vehicles1,406trucks · 6.7%
Road class
Primary road
Congestion ratio
28.1%
Median trip time
34.6 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$55,195

Delays build on Glenn Boulevard Southwest: its congestion ratio of 28% over free-flow time is well above the county's 11%.

2Main StreetPrimary road · 19,950vehicles1,641trucks · 8.2%
Road class
Primary road
Congestion ratio
25.2%
Median trip time
31.5 min
Drivers’ median age
48.0 yrs
Drivers’ average income
$60,443

Main Street carries 5.3 times the county average on its busiest stretch, where the median trip lasts 31.5 minutes.

3AL 35Primary road · 19,156vehicles1,491trucks · 7.8%
Road class
Primary road
Median trip time
33.6 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$58,821

At 5.1 times the county average, AL 35 draws drivers from neighborhoods averaging $58,821 in household income.

4I 59Motorway · 15,762vehicles3,497trucks · 22.2%
Road class
Motorway
Median trip time
56.8 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$55,269

On its busiest stretch, I 59 carries 4.2 times the county average; trucks are 22.2% of it, above the county-wide 12.8%.

5Gault AvenuePrimary road · 12,600vehicles610trucks · 4.8%
Road class
Primary road
Median trip time
29.1 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$49,395

Gault Avenue peaks at 12,600 vehicles a day, 3.4 times the county average; trucks are 4.8% of it, below the county-wide 12.8%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 59Motorway · #4 by traffic15,762vehicles3,497trucks · 22.2%
2Main StreetPrimary road · #2 by traffic19,950vehicles1,641trucks · 8.2%
3AL 35Primary road · #3 by traffic19,156vehicles1,491trucks · 7.8%
4Glenn Boulevard SouthwestPrimary road · #1 by traffic20,950vehicles1,406trucks · 6.7%
5McCurdy AvenueSecondary road · 11,348vehicles786trucks · 6.9%
Road class
Secondary road
Congestion ratio
28.6%
Median trip time
29.5 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$59,258

Travel on McCurdy Avenue's busiest stretch runs 29% over free-flow time, against 11% across the county, so expect slower peak hours.

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

DeKalbDepartment 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 DeKalb County

The same traffic breakdown for the areas closest to DeKalb County, Alabama.

Need segment-level traffic data?

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