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Traffic heat map of Glenn County, California: 316 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Side Highway and CA 32

Glenn County, California Traffic Counts

Its highways carry the highest truck share of any county in California, 26.0%. This page breaks down traffic in Glenn County, California across 316 miles of monitored roads split into 2,173 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 Glenn County, California

Traffic

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

vehicles per day2,803
Trucks

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

19.2%
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.

11.7%
Drivers’ average age

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

46.9 yrs
Drivers’ average income

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

$75,100

A typical monitored road in Glenn County, California sees 2,803 vehicles per day, while its 316 miles of monitored roads together handle 1,075,542 vehicle-miles traveled per day (≈393 million per year). About 1 in 5 vehicles is a truck, well above the 7.8% across California - a freight-heavy mix.

Traffic 78% below the California average

Glenn's average daily traffic volume is 78% lower than the state average - 2,803 vehicles per day against 12,766 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.1% of California's statewide total of vehicle-miles. By volume, Glenn's 2,803 vehicles per day trails 88% of counties in California.

At 33.3 minutes, the average travel time matches the state level closely. 58% of counties in California have a longer average travel time than Glenn's 33.3 minutes.

At 57% lower than the state level, the 11.7% congestion ratio signals smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Glenn County, California

Trafficvehicles per day10,057
Trucks26.0%
Average travel time58.7 min
Congestion ratio21.5%
Drivers’ average age48.9 yrs
Drivers’ average income$74,220

Highways carry more than half of all travel in Glenn County, California (62% of vehicle-miles). The average highway carries 10,057 vehicles per day, 299% more than the average non-highway road in the same area, which carries 2,519 vehicles per day.

Yet highways are only 19% of the road network, 61 miles in 82 segments, so each mile of them is 3.2 times as busy as the average road mile.

The highest highway truck share of any county in California

Highway truck concentration here runs 150% higher than the state average, at 26.0%. That marks Glenn as a major freight corridor, where highway access is what logistics operators compete on.

Glenn also posts the highest highway truck share in California - 26.0%. Glenn's highway truck count is lower than 51% of counties in California, at roughly 2,611 trucks per day.

non-highway traffic icon

Non-highway Traffic in Glenn County, California

Trafficvehicles per day2,519
Trucks8.4%
Average travel time32.3 min
Congestion ratio11.3%
Drivers’ average age46.0 yrs
Drivers’ average income$75,661

A significant share of driving in Glenn County, California, 38% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 2,519 vehicles per day.

Local roads make up 81% of the monitored road miles (255 miles in 2,091 segments) but carry less than their share of travel: 413,172 vehicle-miles traveled per day (≈151 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.4%).

Drivers from lower-income areas than 79% of counties in California

Non-highway roads carry a truck concentration that's 68% lower than the highway network.

At 57% lower than the state level, the non-highway congestion ratio of 11.3% signals easier movement on local roads.

Trip origins here have lower average income than 79% of counties in California. Glenn's median driver age is higher than 63% of counties in California.

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 4:00 PM to 8:00 PM, with volumes reaching approximately 76% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 20% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +5% versus the annual average.
Lowest month:
December is the quietest month, with volumes -13% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Glenn County, California, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +5% in high season.

Glenn County vs. California Traffic Comparison

Of the four measures, highway truck share differs most: Glenn County runs 150% above the California average. Its truck share is also 147% above.

MetricGlenn CountyCalifornia averageDifference
Traffic2,80312,766-78.0%
Truck % (Total Traffic)19.2%7.8%+147.2%
Truck % (Highway)26.0%10.4%+150.1%
Avg. Travel Time33.3 min34.5 min-3.4%

How Glenn County compares

Glenn County moves the least traffic of its nearby counties

Against the 4 nearest areas, Glenn County carries 44.4% less traffic on a typical road and runs 6.3 percentage points more truck traffic; it has the quietest 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.

Glenn 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
Glenn County2,80319.2%1,075,54233.3 min11.7%
Tehama County, California3,66216.2%1,770,11834.9 min12.8%
Colusa County, California3,19121.1%1,487,58839.5 min10.1%
Lake County, California6,1597.4%1,447,76638.4 min19.1%
Butte County, California7,1496.9%3,985,32934.2 min21.7%
California average12,7667.8%N/A34.5 min27.4%

Glenn County ranked within California

No other county-level area in California records a higher truck share on highways than Glenn County.

Glenn County ranked among 58 county-level areas in California (1 = highest); measures without data in every county rank a smaller field, down to 52.
MeasureGlenn CountyCalifornia rank
Traffic volume (AADT)2,803#51 of 58
Highway vehicle-miles per day662,370#47 of 52
Truck share on highways26.0%#1 of 52
Highway trucks per day2,611#27 of 52
Average travel time33.3 min#34 of 58
Average driver income$75,100#46 of 58
Average driver age46.9 yrs#22 of 58

The two ends of this table sit far apart: #1 of 52 on truck share on highways, against #47 of 52 on highway travel volume.

Busiest roads in Glenn County, California

The three busiest roads in Glenn County average 17,580 vehicles a day, 6.3 times the county average of 2,803 across all its monitored roads.

Side Highway is the busiest road, at 21,833 vehicles a day, 5,669 of them trucks (26.0%). It tops the truck ranking too, with the most trucks.

Trips using Side Highway are long: a median of 58.7 minutes against 33.3 county-wide, the mark of a through route.

CA 32 is busy with cars rather than freight: only 8.7% of its traffic is trucks, against 19.2% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Side HighwayMotorway · 21,833vehicles5,669trucks · 26.0%
Road class
Motorway
Congestion ratio
21.5%
Median trip time
58.7 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$74,220

At 7.8 times the county average, Side Highway draws drivers from neighborhoods averaging $74,220 in household income.

2CA 32Primary road · 15,899vehicles1,386trucks · 8.7%
Road class
Primary road
Congestion ratio
43.9%
Median trip time
35.7 min
Drivers’ median age
45.0 yrs
Drivers’ average income
$77,758

Delays build on CA 32: its congestion ratio of 44% over free-flow time is well above the county's 12%.

36th StreetPrimary road · 15,008vehicles1,836trucks · 12.2%
Road class
Primary road
Congestion ratio
44.0%
Median trip time
33.8 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$76,574

Travel on 6th Street's busiest stretch runs 44% over free-flow time, against 12% across the county, so expect slower peak hours.

4Walker StreetPrimary road · 9,983vehicles737trucks · 7.4%
Road class
Primary road
Congestion ratio
31.3%
Median trip time
27.8 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$68,308

Walker Street peaks at 9,983 vehicles a day, 3.6 times the county average; trucks are 7.4% of it, below the county-wide 19.2%.

5Newville RoadPrimary road · 8,351vehicles618trucks · 7.4%
Road class
Primary road
Congestion ratio
25.1%
Median trip time
32.0 min
Drivers’ median age
46.6 yrs
Drivers’ average income
$65,987

Newville Road carries 3.0 times the county average at its busiest, 618 of them trucks (7.4%, below the county-wide 19.2%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1Side HighwayMotorway · #1 by traffic21,833vehicles5,669trucks · 26.0%
26th StreetPrimary road · #3 by traffic15,008vehicles1,836trucks · 12.2%
3CA 32Primary road · #2 by traffic15,899vehicles1,386trucks · 8.7%
4Walker StreetPrimary road · #4 by traffic9,983vehicles737trucks · 7.4%
5Newville RoadPrimary road · #5 by traffic8,351vehicles618trucks · 7.4%
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

GlennDepartment 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 Glenn County

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

Need segment-level traffic data?

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