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Traffic heat map of Sacramento County, California: 2,103 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 80

Sacramento County, California Traffic Counts

Its busiest road, I 80, carries 222,932 vehicles a day, 18.9 times the average road. This page breaks down traffic in Sacramento County, California across 2,103 miles of monitored roads split into 56,774 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 icon

Total Traffic Volume & Performance in Sacramento County, California

Traffic

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

vehicles per day11,802
Trucks

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

5.8%
Average travel time

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

33.3 min
Congestion ratio

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

27.9%
Drivers’ average age

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

43.8 yrs
Drivers’ average income

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

$103,584

The average monitored road in Sacramento County, California carries 11,802 vehicles per day. Across its 2,103 miles of monitored roads, that adds up to 33,124,746 vehicle-miles traveled per day (≈12.1 billion per year). Trucks are a smaller part of the mix than across California: 5.8% against 7.8%.

Busier roads than 84% of counties in California

At 11,802 vehicles per day, the average road in Sacramento carries somewhat less traffic than the state average of 12,766 (8% less). Across the whole network, that travel is about 3.6% of California's statewide total. By volume, Sacramento's 11,802 vehicles per day outpaces 84% of counties in California.

Journey times here (33.3 minutes on average) closely track the state level. Its average travel time of 33.3 minutes is shorter than 56% of counties in California.

At 27.9%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Sacramento County, California

Trafficvehicles per day57,030
Trucks8.5%
Average travel time38.1 min
Congestion ratio71.8%
Drivers’ average age43.4 yrs
Drivers’ average income$103,468

Highways carry a significant share of travel in Sacramento County, California: 43% of all vehicle-miles. The average highway carries 57,030 vehicles per day, 418% more than the average non-highway road in the same area, which carries 11,013 vehicles per day.

Yet highways are only 13% of the road network, 263 miles in 973 segments, so each mile of them is 3.4 times as busy as the average road mile.

By highway travel volume, Sacramento outranks 82% of counties in California.

More highway trucks than 84% of counties in California

Highway truck concentration here runs 18% lower than the state average, at 8.5%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

By truck concentration, highways here trail 73% of counties in California. 84% of counties in California see fewer highway trucks per day than Sacramento's roughly 4,836.

non-highway traffic icon

Non-highway Traffic in Sacramento County, California

Trafficvehicles per day11,013
Trucks3.8%
Average travel time33.2 min
Congestion ratio27.1%
Drivers’ average age44.0 yrs
Drivers’ average income$103,657

A little more than half of the driving in Sacramento County, California happens on local roads: 57% of all vehicle-miles. A typical local road sees 11,013 vehicles per day.

Spread over 1,839 miles and 55,801 segments, 87% of the road network, local roads carry a lighter load per mile: 18,859,089 vehicle-miles traveled per day (≈6.9 billion per year). About 1 in 26 vehicles on non-highway roads is a truck (3.8%).

Drivers from higher-income areas than 65% of counties in California

Compared to highways, non-highway routes see 55% fewer trucks by share.

At 27.1%, the non-highway congestion ratio matches the state level closely.

65% of counties in California see lower average driver income among trip origins than Sacramento. 60% of counties in California have an older driver population than Sacramento.

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 8:00 PM, with volumes reaching approximately 69% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 14% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
August–October is the high season, with volumes +9% versus the annual average.
Lowest month:
January is the quietest month, with volumes -19% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Sacramento County, California, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +9% in high season.

Sacramento County vs. California Traffic Comparison

Sacramento County's biggest difference from the California average is its truck share, 25% below it. Its highway truck share is also 18% below.

MetricSacramento CountyCalifornia averageDifference
Traffic11,80212,766-7.5%
Truck % (Total Traffic)5.8%7.8%-25.1%
Truck % (Highway)8.5%10.4%-18.3%
Avg. Travel Time33.3 min34.5 min-3.4%

How Sacramento County compares

Sacramento County moves more traffic than any nearby county

Set against the average of the 4 areas nearest to it, Sacramento County moves 3.1 times the total daily travel and carries 59.0% 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.

Sacramento 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
Sacramento County11,8025.8%33,124,74633.3 min27.9%
Amador County, California4,3407.4%915,83434.3 min15.5%
San Joaquin County, California8,64111.7%20,111,41032.8 min23.3%
Yolo County, California6,49911.8%5,669,59433.4 min17.9%
Solano County, California10,2088.2%15,382,40732.4 min25.5%
California average12,7667.8%N/A34.5 min27.4%

Sacramento County ranked within California

Highway truck volume places Sacramento County #9 of 52 in California - the top quarter of the state.

Sacramento County ranked among 58 county-level areas in California (1 = highest); measures without data in every county rank a smaller field, down to 52.
MeasureSacramento CountyCalifornia rank
Traffic volume (AADT)11,802#10 of 58
Highway vehicle-miles per day14,265,657#10 of 52
Truck share on highways8.5%#38 of 52
Highway trucks per day4,836#9 of 52
Average travel time33.3 min#33 of 58
Average driver income$103,584#21 of 58
Average driver age43.8 yrs#35 of 58

Busiest roads in Sacramento County, California

Traffic concentrates on a few corridors: the three busiest roads average 170,199 vehicles a day, against 11,802 on the average road in Sacramento County.

I 80 leads with 222,932 vehicles a day, 13,368 of them trucks (6.0%). It tops the truck ranking too, with the most trucks.

Freight stands out on Side Freeway: trucks are 15.5% of the traffic there, against 5.8% county-wide.

Side Freeway carries longer journeys than most roads here, with a median trip of 49.9 minutes against 33.3 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 80Motorway · 222,932vehicles13,368trucks · 6.0%
Road class
Motorway
Congestion ratio
90.2%
Median trip time
35.0 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$100,928

Travel on I 80's busiest stretch runs 90% over free-flow time, against 28% across the county, so expect slower peak hours.

2Capital City FreewayMotorway · 152,387vehicles8,470trucks · 5.6%
Road class
Motorway
Congestion ratio
86.1%
Median trip time
39.3 min
Drivers’ median age
42.6 yrs
Drivers’ average income
$97,047

At 12.9 times the county average, Capital City Freeway draws drivers from neighborhoods averaging $97,047 in household income.

3El Dorado FreewayMotorway · 135,278vehicles8,356trucks · 6.2%
Road class
Motorway
Congestion ratio
77.1%
Median trip time
35.0 min
Drivers’ median age
44.7 yrs
Drivers’ average income
$116,994

A main artery: El Dorado Freeway's busiest stretch carries 11.5 times the county average; trucks are 6.2% of it, above the county-wide 5.8%.

4Sacramento Beltline FreewayMotorway · 119,182vehicles12,035trucks · 10.1%
Road class
Motorway
Congestion ratio
66.6%
Median trip time
38.5 min
Drivers’ median age
43.1 yrs
Drivers’ average income
$95,465

Sacramento Beltline Freeway is a trunk route for the county, carrying 10.1 times the county average on its busiest stretch; trucks are 10.1% of it, above the county-wide 5.8%.

5Sacramento FreewayMotorway · 118,878vehicles9,804trucks · 8.2%
Road class
Motorway
Congestion ratio
86.4%
Median trip time
39.5 min
Drivers’ median age
43.0 yrs
Drivers’ average income
$100,385

Sacramento Freeway is one of the more congested roads here: trips take 86% longer than at free-flow speed, against 28% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 80Motorway · #1 by traffic222,932vehicles13,368trucks · 6.0%
2Sacramento Beltline FreewayMotorway · #4 by traffic119,182vehicles12,035trucks · 10.1%
3Side HighwayMotorway · 105,634vehicles10,518trucks · 10.0%
Road class
Motorway
Congestion ratio
61.3%
Median trip time
42.7 min
Drivers’ median age
42.6 yrs
Drivers’ average income
$103,234

Side Highway carries 9.0 times the county average at its busiest, 10,518 of them trucks (10.0%, above the county-wide 5.8%).

4Side FreewayMotorway · 64,244vehicles9,949trucks · 15.5%
Road class
Motorway
Congestion ratio
57.4%
Median trip time
49.9 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$109,836

Side Freeway carries 5.4 times the county average on its busiest stretch, where the median trip lasts 49.9 minutes.

5Sacramento FreewayMotorway · #5 by traffic118,878vehicles9,804trucks · 8.2%
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

SacramentoDepartment 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 Sacramento County

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

Need segment-level traffic data?

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