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Traffic heat map of Kern County, California: 3,395 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Golden State Freeway

Kern County, California Traffic Counts

About 1 in 6 vehicles here is a truck, against 1 in 13 across California. This page breaks down traffic in Kern County, California across 3,395 miles of monitored roads split into 35,880 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 Kern County, California

Traffic

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

vehicles per day6,263
Trucks

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

16.4%
Average travel time

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

34.5 min
Congestion ratio

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

17.8%
Drivers’ average age

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

41.0 yrs
Drivers’ average income

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

$83,742

Our data shows 6,263 vehicles per day on the average road in Kern County, California, and 27,254,553 vehicle-miles traveled per day (≈9.9 billion per year) across its 3,395 miles of monitored roads. Freight weighs heavily here: trucks are 16.4% of traffic, against 7.8% across California.

Traffic 51% below the California average

Kern's average daily traffic volume is 51% lower than the state average - 6,263 vehicles per day against 12,766 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 2.9% of California's statewide total. 54% of counties in California see more traffic than Kern's 6,263 vehicles per day.

The average trip takes 34.5 minutes, on par with the state level. Its average travel time of 34.5 minutes is longer than 63% of counties in California.

The congestion ratio of 17.8% is 35% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Kern County, California

Trafficvehicles per day14,981
Trucks22.1%
Average travel time50.7 min
Congestion ratio28.1%
Drivers’ average age40.8 yrs
Drivers’ average income$79,905

A little more than half of the driving in Kern County, California happens on highways: 62% of all vehicle-miles. The average highway carries 14,981 vehicles per day, 164% more than the average non-highway road in the same area, which carries 5,674 vehicles per day.

Highways make up 28% of the monitored road miles (952 miles, 2,271 segments), so they carry more than their share: 17,021,414 vehicle-miles traveled per day (≈6.2 billion per year).

86% of counties in California move less traffic on their highways.

A major freight corridor

The concentration of trucks on highways (22.1%) is 113% higher than the state average for similar road classifications. That marks Kern as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 90% of counties in California. 75% of counties in California see fewer highway trucks per day than Kern's roughly 3,308.

non-highway traffic icon

Non-highway Traffic in Kern County, California

Trafficvehicles per day5,674
Trucks7.1%
Average travel time33.4 min
Congestion ratio17.2%
Drivers’ average age41.1 yrs
Drivers’ average income$85,260

Local roads carry a significant share of travel in Kern County, California: 38% of all vehicle-miles. On the average non-highway road, that comes to 5,674 vehicles per day.

Local roads make up 72% of the monitored road miles (2,442 miles in 33,609 segments) but carry less than their share of travel: 10,233,139 vehicle-miles traveled per day (≈3.7 billion per year). Trucks make up 7.1% of non-highway traffic, about 1 in 14 vehicles.

Younger drivers than 93% of counties in California

Compared to highways, non-highway routes see 68% fewer trucks by share.

The non-highway congestion ratio of 17.2% is 35% lower than the state level, suggesting more efficient local mobility than the state average.

Kern's average driver income is lower than 60% of counties in California. 93% of counties in California have an older driver population than Kern.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 3:00 PM to 8:00 PM, with volumes reaching approximately 65% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 7% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +10% versus the annual average.
Lowest month:
January is the quietest month, with volumes -10% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Kern County, California, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +10% in high season.

Kern County vs. California Traffic Comparison

Of the four measures, highway truck share differs most: Kern County runs 113% above the California average. Its truck share is also 112% above.

MetricKern CountyCalifornia averageDifference
Traffic6,26312,766-50.9%
Truck % (Total Traffic)16.4%7.8%+111.7%
Truck % (Highway)22.1%10.4%+112.7%
Avg. Travel Time34.5 min34.5 min+0.1%

How Kern County compares

Kern County has a higher truck share than any nearby county

Set against the average of the 4 areas nearest to it, Kern County carries 40.2% less traffic on a typical road and runs 7.1 percentage points more truck traffic; it has the fourth busiest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.

Kern County and the 4 nearest county-level areas by centroid distance, with the California average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Kern County6,26316.4%27,254,55334.5 min17.8%
Tulare County, California6,29011.6%11,280,06034.6 min15.3%
Ventura County, California10,6966.1%16,797,31832.9 min29.9%
Los Angeles County, California19,0006.0%204,530,09437.1 min33.4%
Kings County, California5,88313.9%4,712,57731.7 min17.1%
California average12,7667.8%N/A34.5 min27.4%

Kern County ranked within California

Average driver age places Kern County #54 of 58 in California - the bottom quarter of the state.

Kern County ranked among 58 county-level areas in California (1 = highest); measures without data in every county rank a smaller field, down to 52.
MeasureKern CountyCalifornia rank
Traffic volume (AADT)6,263#32 of 58
Highway vehicle-miles per day17,021,414#8 of 52
Truck share on highways22.1%#6 of 52
Highway trucks per day3,308#14 of 52
Average travel time34.5 min#22 of 58
Average driver income$83,742#35 of 58
Average driver age41.0 yrs#54 of 58

The two ends of this table sit far apart: #6 of 52 on truck share on highways, against #54 of 58 on average driver age.

Busiest roads in Kern County, California

On their busiest stretches, the three busiest roads in Kern County carry 71,924 vehicles a day on average, 11.5 times the typical road in the county (6,263).

Golden State Freeway leads with 81,646 vehicles a day, 16,829 of them trucks (20.6%). Golden State Highway carries the most trucks, 17,632 a day (23.8% of its traffic), although it ranks #2 for all traffic.

Mojave-Barstow Highway carries longer journeys than most roads here, with a median trip of 63.6 minutes against 34.5 county-wide.

Trucks make up 30.0% of traffic on Mojave-Barstow Highway, against 16.4% across all roads in the county.

Few trucks use Rosedale Highway: 6.1% of its traffic, under half the county's 16.4%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Golden State FreewayMotorway · 81,646vehicles16,829trucks · 20.6%
Road class
Motorway
Congestion ratio
58.4%
Median trip time
50.6 min
Drivers’ median age
40.1 yrs
Drivers’ average income
$80,048

Travel on Golden State Freeway's busiest stretch runs 58% over free-flow time, against 18% across the county, so expect slower peak hours.

2Golden State HighwayMotorway · 74,001vehicles17,632trucks · 23.8%
Road class
Motorway
Congestion ratio
52.5%
Median trip time
57.1 min
Drivers’ median age
39.7 yrs
Drivers’ average income
$72,547

Golden State Highway is one of the more congested roads here: trips take 52% longer than at free-flow speed, against 18% county-wide.

3Rosedale HighwayPrimary road · 60,126vehicles3,655trucks · 6.1%
Road class
Primary road
Congestion ratio
49.0%
Median trip time
31.4 min
Drivers’ median age
42.3 yrs
Drivers’ average income
$94,189

Rosedale Highway carries 9.6 times the county average at its busiest, 3,655 of them trucks (6.1%, below the county-wide 16.4%).

4Side FreewayMotorway · 51,115vehicles11,964trucks · 23.4%
Road class
Motorway
Congestion ratio
44.0%
Median trip time
56.6 min
Drivers’ median age
37.0 yrs
Drivers’ average income
$79,365

Side Freeway carries through traffic: the median trip using it lasts 56.6 minutes, against 34.5 for the county.

5Golden State AvenueMotorway · 40,284vehicles3,618trucks · 9.0%
Road class
Motorway
Congestion ratio
52.0%
Median trip time
29.7 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$87,426

Golden State Avenue carries 6.4 times the county average on its busiest stretch, where the median trip lasts 29.7 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Golden State HighwayMotorway · #2 by traffic74,001vehicles17,632trucks · 23.8%
2Golden State FreewayMotorway · #1 by traffic81,646vehicles16,829trucks · 20.6%
3Side FreewayMotorway · #4 by traffic51,115vehicles11,964trucks · 23.4%
4Bakersfield Tehachapi HighwayMotorway · 37,989vehicles8,915trucks · 23.5%
Road class
Motorway
Congestion ratio
40.7%
Median trip time
41.7 min
Drivers’ median age
40.7 yrs
Drivers’ average income
$70,982

At 6.1 times the county average, Bakersfield Tehachapi Highway draws drivers from neighborhoods averaging $70,982 in household income.

5Mojave-Barstow HighwayMotorway · 25,973vehicles7,799trucks · 30.0%
Road class
Motorway
Median trip time
63.6 min
Drivers’ median age
43.3 yrs
Drivers’ average income
$58,642

At 4.1 times the county average, Mojave-Barstow Highway draws drivers from neighborhoods averaging $58,642 in household income.

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

KernDepartment 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 Kern County

The same traffic breakdown for the areas closest to Kern County, California.

Need segment-level traffic data?

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