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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day8,668 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 13.1% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 43.4 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 20.8% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 41.5 yrs |
Drivers’ average incomeAverage 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.
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.
| Traffic | vehicles per day14,106 |
|---|---|
| Trucks | 14.9% |
| Average travel time | 51.0 min |
| Congestion ratio | 31.5% |
| Drivers’ average age | 41.5 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.
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.
| Traffic | vehicles per day7,063 |
|---|---|
| Trucks | 8.3% |
| Average travel time | 41.2 min |
| Congestion ratio | 17.7% |
| Drivers’ average age | 41.5 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%).
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.
Of the four measures, truck share differs most: Imperial County runs 68% above the California average. Its highway truck share is also 43% above.
| Metric | Imperial County | California average | Difference |
|---|---|---|---|
| Traffic | 8,668 | 12,766 | -32.1% |
| Truck % (Total Traffic) | 13.1% | 7.8% | +68.0% |
| Truck % (Highway) | 14.9% | 10.4% | +43.2% |
| Avg. Travel Time | 43.4 min | 34.5 min | +25.9% |
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.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Imperial County | 8,668 | 13.1% | 6,475,282 | 43.4 min | 20.8% |
| Riverside County, California | 12,881 | 8.5% | 71,474,673 | 34.5 min | 29.2% |
| San Diego County, California | 14,311 | 5.5% | 85,105,406 | 30.0 min | 31.4% |
| Yuma County, Arizona | 6,821 | 10.5% | 4,299,754 | 33.9 min | 14.6% |
| La Paz County, Arizona | 3,896 | 23.5% | 2,850,962 | 40.9 min | 8.4% |
| California average | 12,766 | 7.8% | N/A | 34.5 min | 27.4% |
Imperial County sits in the top quarter of the California field on average travel time, at #4 of 58.
| Measure | Imperial County | California rank |
|---|---|---|
| Traffic volume (AADT) | 8,668 | #21 of 58 |
| Highway vehicle-miles per day | 4,678,711 | #22 of 52 |
| Truck share on highways | 14.9% | #19 of 52 |
| Highway trucks per day | 2,096 | #41 of 52 |
| Average travel time | 43.4 min | #4 of 58 |
| Average driver income | $71,380 | #48 of 58 |
| Average driver age | 41.5 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.
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%.
Imperial Avenue is one of the more congested roads here: trips take 68% longer than at free-flow speed, against 21% county-wide.
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%).
4th Street carries 4.1 times the county average on its busiest stretch, where the median trip lasts 36.1 minutes.
Delays build on 8th Street: its congestion ratio of 69% over free-flow time is well above the county's 21%.
Trips on Brawley Avenue are short, a median 27.0 minutes against 43.4 county-wide, so it mostly serves local errands and commutes.
At 3.1 times the county average, I 8 draws drivers from neighborhoods averaging $77,402 in household income.
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%.
Trucks make up 19.9% of CA 78 / CA 86's traffic, against 13.1% across the county, so freight weighs heavily here.
CA 78 / CA 111 leans on freight: 2,964 trucks a day, 20.0% of its traffic against 13.1% county-wide.
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%.
The average monitored road in Imperial carries 8,668 vehicles per day, 32% less than the California average of 12,766.
Imperial's average travel time of 43.4 minutes is longer than 95% of counties in California.
Approximately 1% of highway traffic and 0% of non-highway traffic consists of vehicles whose trip originates outside Imperial County, California. Even highway traffic is mostly local, so these roads mainly serve residents and commuters.
The average trip in Imperial takes 43.4 minutes, 26% longer than the California average of 34.5 minutes, delays at signals and congestion included.
Trucks make up about 13.1% of all traffic in Imperial County, California, rising to 14.9% on highways, where long-haul freight concentrates.
Drivers on Imperial roads have a median age of 42 years, and the median household income of the neighborhoods trips originate from averages $71,380, 36% below the California average.
Imperial Avenue carries the most, 42,767 vehicles per day on its busiest stretch, followed by Adams Avenue (37,026), 4th Street (35,944), 8th Street (34,320), Brawley Avenue (29,754). Figures are AADT, both directions combined.
I 8, with about 3,946 trucks per day on its busiest stretch, 14.5% of its 27,138 vehicles.
About 42,767 vehicles per day in both directions on its busiest stretch, including 1,433 trucks (3.4%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

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