Need segment-level traffic data?

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

Get insights →
Traffic heat map of Imperial County, California: 1,003 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Imperial Avenue

Imperial County, California Traffic Counts

Trips here are among the 5 longest of any county in California. This page breaks down traffic in Imperial County, California across 1,003 miles of monitored roads split into 5,577 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
Find my place
total traffic icon

Total Traffic Volume & Performance in Imperial County, California

Traffic

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

vehicles per day8,668
Trucks

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

13.1%
Average travel time

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

43.4 min
Congestion ratio

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

20.8%
Drivers’ average age

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

41.5 yrs
Drivers’ average income

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

$71,380

Our data shows 8,668 vehicles per day on the average road in Imperial County, California, and 6,475,282 vehicle-miles traveled per day (≈2.4 billion per year) across its 1,003 miles of monitored roads. Freight weighs heavily here: trucks are 13.1% of traffic, against 7.8% across California.

Longer trips than 95% of counties in California

At 8,668 vehicles per day, the average monitored road in Imperial carries 32% less traffic than the state average of 12,766, suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 0.7% of California's statewide total of vehicle-miles. 65% of counties in California see less traffic than Imperial's 8,668 vehicles per day.

The average trip takes 43.4 minutes, 26% higher than the state level. On travel time, Imperial runs longer than 95% of counties in California.

The congestion ratio of 20.8% is 24% lower, pointing to smoother traffic flow than the state level - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Imperial County, California

Trafficvehicles per day14,106
Trucks14.9%
Average travel time51.0 min
Congestion ratio31.5%
Drivers’ average age41.5 yrs
Drivers’ average income$69,970

Highways carry most of the traffic in Imperial County, California: 72% of all vehicle-miles. The average highway carries 14,106 vehicles per day, 100% more than the average non-highway road in the same area, which carries 7,063 vehicles per day.

With 47% of the road miles (472 miles in 1,271 segments), highways punch above their length, carrying 4,678,711 vehicle-miles traveled per day (≈1.7 billion per year).

By highway travel volume, Imperial outranks 59% of counties in California.

Fewer highway trucks than 78% of counties in California

At 14.9%, highway truck share is 43% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 65% of counties in California. Imperial's highway truck count is lower than 78% of counties in California, at roughly 2,096 trucks per day.

non-highway traffic icon

Non-highway Traffic in Imperial County, California

Trafficvehicles per day7,063
Trucks8.3%
Average travel time41.2 min
Congestion ratio17.7%
Drivers’ average age41.5 yrs
Drivers’ average income$72,862

Local roads carry a smaller share of travel in Imperial County, California, 28% of vehicle-miles; most driving happens on highways. A typical local road sees 7,063 vehicles per day.

Spread over 531 miles and 4,306 segments, 53% of the road network, local roads carry a lighter load per mile: 1,796,572 vehicle-miles traveled per day (≈656 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.3%).

Younger drivers than 88% of counties in California

Non-highway roads carry a truck concentration that's 44% lower than the highway network.

The non-highway congestion ratio of 17.7% is 33% lower than the state level, suggesting more efficient local mobility than the state average.

Trip origins here have lower average income than 82% of counties in California. 88% of counties in California have an older driver population than Imperial.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Imperial County, California, the peak hour concentrates about 7% of the day's traffic.

Imperial County vs. California Traffic Comparison

Of the four measures, truck share differs most: Imperial County runs 68% above the California average. Its highway truck share is also 43% above.

MetricImperial CountyCalifornia averageDifference
Traffic8,66812,766-32.1%
Truck % (Total Traffic)13.1%7.8%+68.0%
Truck % (Highway)14.9%10.4%+43.2%
Avg. Travel Time43.4 min34.5 min+25.9%

How Imperial County compares

Imperial County against nearby counties

Against the 4 nearest areas, Imperial County moves 15.8% of the total daily travel and sees 24.7% longer typical trips; it has the third busiest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.

Imperial 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
Imperial County8,66813.1%6,475,28243.4 min20.8%
Riverside County, California12,8818.5%71,474,67334.5 min29.2%
San Diego County, California14,3115.5%85,105,40630.0 min31.4%
Yuma County, Arizona6,82110.5%4,299,75433.9 min14.6%
La Paz County, Arizona3,89623.5%2,850,96240.9 min8.4%
California average12,7667.8%N/A34.5 min27.4%

Imperial County ranked within California

Imperial County sits in the top quarter of the California field on average travel time, at #4 of 58.

Imperial County ranked among 58 county-level areas in California (1 = highest); measures without data in every county rank a smaller field, down to 52.
MeasureImperial CountyCalifornia rank
Traffic volume (AADT)8,668#21 of 58
Highway vehicle-miles per day4,678,711#22 of 52
Truck share on highways14.9%#19 of 52
Highway trucks per day2,096#41 of 52
Average travel time43.4 min#4 of 58
Average driver income$71,380#48 of 58
Average driver age41.5 yrs#51 of 58

The two ends of this table sit far apart: #4 of 58 on average travel time, against #51 of 58 on average driver age.

Busiest roads in Imperial County, California

On their busiest stretches, the three busiest roads in Imperial County carry 38,579 vehicles a day on average, 4.5 times the typical road in the county (8,668).

Imperial Avenue leads with 42,767 vehicles a day, 1,433 of them trucks (3.4%). I 8 carries the most trucks, 3,946 a day (14.5% of its traffic), although it is not among the 5 busiest roads overall.

The truck ranking looks different from the traffic one, sharing just 0 of its 5 roads.

Drivers on Kumeyaay Highway come from neighborhoods with an average household income of $42,589, 40% below the county average of $71,380.

Few trucks use Imperial Avenue: 3.4% of its traffic, under half the county's 13.1%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Imperial AvenueTrunk road · 42,767vehicles1,433trucks · 3.4%
Road class
Trunk road
Congestion ratio
68.4%
Median trip time
58.6 min
Drivers’ median age
41.6 yrs
Drivers’ average income
$72,073

Imperial Avenue is one of the more congested roads here: trips take 68% longer than at free-flow speed, against 21% county-wide.

2Adams AvenuePrimary road · 37,026vehicles1,478trucks · 4.0%
Road class
Primary road
Congestion ratio
38.7%
Median trip time
39.1 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$64,803

Adams Avenue carries 4.3 times the county average at its busiest, 1,478 of them trucks (4.0%, below the county-wide 13.1%).

34th StreetPrimary road · 35,944vehicles1,737trucks · 4.8%
Road class
Primary road
Congestion ratio
43.3%
Median trip time
36.1 min
Drivers’ median age
41.7 yrs
Drivers’ average income
$65,312

4th Street carries 4.1 times the county average on its busiest stretch, where the median trip lasts 36.1 minutes.

48th StreetTertiary road · 34,320vehicles898trucks · 2.6%
Road class
Tertiary road
Congestion ratio
69.1%
Median trip time
54.8 min
Drivers’ median age
40.8 yrs
Drivers’ average income
$67,153

Delays build on 8th Street: its congestion ratio of 69% over free-flow time is well above the county's 21%.

5Brawley AvenueTrunk road · 29,754vehicles1,276trucks · 4.3%
Road class
Trunk road
Congestion ratio
29.7%
Median trip time
27.0 min
Drivers’ median age
40.9 yrs
Drivers’ average income
$80,989

Trips on Brawley Avenue are short, a median 27.0 minutes against 43.4 county-wide, so it mostly serves local errands and commutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 8Motorway · 27,138vehicles3,946trucks · 14.5%
Road class
Motorway
Congestion ratio
25.9%
Median trip time
50.4 min
Drivers’ median age
41.0 yrs
Drivers’ average income
$77,402

At 3.1 times the county average, I 8 draws drivers from neighborhoods averaging $77,402 in household income.

2Kumeyaay HighwayMotorway · 26,548vehicles3,759trucks · 14.2%
Road class
Motorway
Congestion ratio
28.7%
Median trip time
40.3 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$42,589

The busiest stretch of Kumeyaay Highway carries 3.1 times the county average; trucks are 14.2% of it, above the county-wide 13.1%.

3CA 78 / CA 86Trunk road · 16,060vehicles3,201trucks · 19.9%
Road class
Trunk road
Median trip time
49.4 min
Drivers’ median age
41.0 yrs
Drivers’ average income
$55,183

Trucks make up 19.9% of CA 78 / CA 86's traffic, against 13.1% across the county, so freight weighs heavily here.

4CA 78 / CA 111Trunk road · 14,841vehicles2,964trucks · 20.0%
Road class
Trunk road
Congestion ratio
14.3%
Median trip time
48.7 min
Drivers’ median age
40.0 yrs
Drivers’ average income
$76,979

CA 78 / CA 111 leans on freight: 2,964 trucks a day, 20.0% of its traffic against 13.1% county-wide.

5CA 111Trunk road · 23,238vehicles2,901trucks · 12.5%
Road class
Trunk road
Congestion ratio
23.1%
Median trip time
32.0 min
Drivers’ median age
41.6 yrs
Drivers’ average income
$69,620

On its busiest stretch, CA 111 carries 2.7 times the county average; trucks are 12.5% of it, in line with the county-wide 13.1%.

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

ImperialDepartment 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.
link arrow icon
Data current as of:
Q3 2026

Explore further

TrafficZoom platform

— street-level analytics and custom corridor reports.

Map AI

— demographics, housing and mobility data.

Counties near Imperial County

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

Need segment-level traffic data?

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