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Traffic heat map of Los Angeles County, California: 8,894 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Artesia Freeway

Los Angeles County, California Traffic Counts

TrafficZoom tracks traffic on 8,894 road miles in Los Angeles County, California, divided into 337,723 segments averaging 139 ft. It has the busiest roads of any county in California, averaging 19,000 vehicles a day. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Los Angeles County, California

Traffic

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

vehicles per day19,000
Trucks

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

6.0%
Average travel time

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

37.1 min
Congestion ratio

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

33.4%
Drivers’ average age

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

43.4 yrs
Drivers’ average income

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

$103,580

The average monitored road in Los Angeles County, California carries 19,000 vehicles per day. Across its 8,894 miles of monitored roads, that adds up to 204,530,094 vehicle-miles traveled per day (≈74.7 billion per year). About 1 in 17 vehicles is a truck, fewer than the 1 in 13 across California.

The busiest roads of any county in California

Los Angeles sees 49% higher average daily traffic volume than the state average (19,000 vehicles per day against 12,766), suggesting more demand on each road - more exposure for roadside businesses, and more competition for road space. Across the whole network, that travel is about 22% of California's statewide total. Los Angeles stands out as having the highest traffic volume in California - 19,000 vehicles per day.

Journey times run 7% higher than the state level, at 37.1 minutes on average. Its average travel time of 37.1 minutes is longer than 77% of counties in California.

Congestion runs 22% higher than the state level, at a ratio of 33.4%, which means more pronounced congestion - relevant for traffic control and delivery planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Los Angeles County, California

Trafficvehicles per day71,593
Trucks7.4%
Average travel time42.9 min
Congestion ratio78.2%
Drivers’ average age43.0 yrs
Drivers’ average income$107,170

Highways carry about half of all travel in Los Angeles County, California, 50% of vehicle-miles. The average highway carries 71,593 vehicles per day, 308% more than the average non-highway road in the same area, which carries 17,561 vehicles per day.

Yet highways are only 15% of the road network, 1,346 miles in 8,990 segments, so each mile of them is 3.3 times as busy as the average road mile.

By highway travel volume, Los Angeles ranks first in California.

More highway trucks than 94% of counties in California

At 7.4%, highway truck share is 29% lower than the state average. Trucks are a small share of a very large highway flow, so Los Angeles still moves heavy freight volumes alongside its passenger traffic.

By truck concentration, highways here trail 90% of counties in California. By raw truck volume, Los Angeles carries more highway trucks than 94% of counties in California.

non-highway traffic icon

Non-highway Traffic in Los Angeles County, California

Trafficvehicles per day17,561
Trucks4.5%
Average travel time36.9 min
Congestion ratio32.2%
Drivers’ average age43.8 yrs
Drivers’ average income$101,475

Local roads carry about half of all travel in Los Angeles County, California, 50% of vehicle-miles. A typical local road sees 17,561 vehicles per day.

Spread over 7,548 miles and 328,733 segments, 85% of the road network, local roads carry a lighter load per mile: 102,253,922 vehicle-miles traveled per day (≈37.3 billion per year). Trucks make up 4.5% of non-highway traffic, about 1 in 22 vehicles.

Younger drivers than 67% of counties in California

The concentration of trucks on non-highway roads is 39% lower than on highways.

The non-highway congestion ratio of 32.2% is 21% higher than the state level, suggesting slower local mobility than the state average.

Los Angeles's average driver income is higher than 63% of counties in California. 67% of counties in California have an older driver population than Los Angeles.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and a long afternoon plateau from 3:00 PM to 9:00 PM, with volumes reaching approximately 55% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 10% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +10% versus the annual average.
Lowest month:
November is the quietest month, with volumes -13% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Los Angeles County, California, traffic is spread evenly through the day, with the busiest hour carrying only about 6%, and there is a noticeable seasonal swing of +10% in high season.

Los Angeles County vs. California Traffic Comparison

The average daily traffic per road sets Los Angeles County apart: 49% above the California average. Its highway truck share, by contrast, is 29% below.

MetricLos Angeles CountyCalifornia averageDifference
Traffic19,00012,766+48.8%
Truck % (Total Traffic)6.0%7.8%-23.3%
Truck % (Highway)7.4%10.4%-28.6%
Avg. Travel Time37.1 min34.5 min+7.5%

How Los Angeles County compares

Los Angeles County moves more traffic than any nearby county

Set against the average of the 4 areas nearest to it, Los Angeles County moves 6.7 times the total daily travel and carries 83.2% more traffic on a typical road; it has the busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Los Angeles 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
Los Angeles County19,0006.0%204,530,09437.1 min33.4%
Orange County, California15,4354.9%68,602,70333.5 min28.1%
Ventura County, California10,6966.1%16,797,31832.9 min29.9%
Kern County, California6,26316.4%27,254,55334.5 min17.8%
Santa Barbara County, California9,1008.1%9,572,21437.8 min25.9%
California average12,7667.8%N/A34.5 min27.4%

Los Angeles County ranked within California

Los Angeles County leads California on 2 of the measures below: average daily traffic volume and highway travel volume.

Los Angeles County ranked among 58 county-level areas in California (1 = highest); measures without data in every county rank a smaller field, down to 52.
MeasureLos Angeles CountyCalifornia rank
Traffic volume (AADT)19,000#1 of 58
Highway vehicle-miles per day102,276,172#1 of 52
Truck share on highways7.4%#47 of 52
Highway trucks per day5,305#4 of 52
Average travel time37.1 min#14 of 58
Average driver income$103,580#22 of 58
Average driver age43.4 yrs#39 of 58

Los Angeles County ranks #1 of 52 on highway travel volume but #47 of 52 on truck share on highways. It carries some of the heaviest highway traffic in California, but very little of it is freight - this is commuter and local car volume, not through-trucking.

Busiest roads in Los Angeles County, California

The three busiest roads in Los Angeles County average 242,410 vehicles a day, 12.8 times the county average of 19,000 across all its monitored roads.

Artesia Freeway leads with 254,879 vehicles a day, 14,690 of them trucks (5.8%). San Diego Freeway is practically level with it at 247,964. Golden State Freeway carries the most trucks, 16,080 a day (11.1% of its traffic), although it is not among the 5 busiest roads overall.

Freight stands out on Golden State Freeway: trucks are 11.1% of the traffic there, against 6.0% county-wide.

Traffic and freight follow different roads here: only 2 of the five busiest roads also make the top 5 for trucks.

Drivers on Ventura Freeway come from neighborhoods with an average household income of $131,233, 27% above the county average of $103,580.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Artesia FreewayMotorway · 254,879vehicles14,690trucks · 5.8%
Road class
Motorway
Congestion ratio
108.2%
Median trip time
42.5 min
Drivers’ median age
42.7 yrs
Drivers’ average income
$104,297

Delays build on Artesia Freeway: its congestion ratio of 108% over free-flow time is well above the county's 33%.

2San Diego FreewayMotorway · 247,964vehicles14,169trucks · 5.7%
Road class
Motorway
Congestion ratio
102.0%
Median trip time
43.2 min
Drivers’ median age
42.4 yrs
Drivers’ average income
$120,614

San Diego Freeway carries 13.1 times the county average on its busiest stretch, where the median trip lasts 43.2 minutes.

3Century FreewayMotorway · 224,387vehicles13,644trucks · 6.1%
Road class
Motorway
Congestion ratio
123.8%
Median trip time
42.0 min
Drivers’ median age
40.8 yrs
Drivers’ average income
$87,009

Travel on Century Freeway's busiest stretch runs 124% over free-flow time, against 33% across the county, so expect slower peak hours.

4Ventura FreewayMotorway · 213,610vehicles12,531trucks · 5.9%
Road class
Motorway
Congestion ratio
106.5%
Median trip time
39.6 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$131,233

At 11.2 times the county average, Ventura Freeway draws drivers from neighborhoods averaging $131,233 in household income.

5Pomona FreewayMotorway · 206,200vehicles15,296trucks · 7.4%
Road class
Motorway
Congestion ratio
93.0%
Median trip time
44.2 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$101,469

A main artery: Pomona Freeway's busiest stretch carries 10.9 times the county average; trucks are 7.4% of it, above the county-wide 6.0%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Golden State FreewayMotorway · 145,022vehicles16,080trucks · 11.1%
Road class
Motorway
Congestion ratio
93.1%
Median trip time
44.8 min
Drivers’ median age
43.0 yrs
Drivers’ average income
$110,695

Golden State Freeway is a trunk route for the county, carrying 7.6 times the county average on its busiest stretch; trucks are 11.1% of it, above the county-wide 6.0%.

2Pomona FreewayMotorway · #5 by traffic206,200vehicles15,296trucks · 7.4%
3Santa Ana FreewayMotorway · 189,656vehicles15,009trucks · 7.9%
Road class
Motorway
Congestion ratio
106.5%
Median trip time
46.0 min
Drivers’ median age
39.4 yrs
Drivers’ average income
$97,551

Santa Ana Freeway carries 10.0 times the county average at its busiest, 15,009 of them trucks (7.9%, above the county-wide 6.0%).

4Artesia FreewayMotorway · #1 by traffic254,879vehicles14,690trucks · 5.8%
5Gardena FreewayMotorway · 189,952vehicles14,225trucks · 7.5%
Road class
Motorway
Congestion ratio
80.2%
Median trip time
38.5 min
Drivers’ median age
44.1 yrs
Drivers’ average income
$99,758

Gardena Freeway carries 10.0 times the county average on its busiest stretch, where the median trip lasts 38.5 minutes.

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

Los AngelesDepartment 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 Los Angeles County

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

Need segment-level traffic data?

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