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Traffic | vehicles per day4,808 |
|---|---|
Trucks | 11.6% |
Average travel time | 30.1 min |
Congestion ratio | 15.6% |
Drivers’ average age | 39.1 yrs |
Drivers’ average income | $93,457 |
The average monitored road in Johnson County, Iowa carries 4,808 vehicles per day. Across its 591 miles of monitored roads, that adds up to 3,555,946 vehicle-miles traveled per day (≈1.3 billion per year). About 1 in 9 vehicles is a truck, in line with Iowa (11.0%).
Johnson sees 58% higher average daily traffic volume than the state average (4,808 vehicles per day against 3,042), suggesting more demand on each road - prime passing trade for storefronts, with more competition for road space. Across the whole network, that travel is about 4.3% of Iowa's statewide total. Johnson carries more traffic than 97% of counties in Iowa.
At 30.1 minutes, the average travel time is 9% lower than the state level. Its average travel time of 30.1 minutes is shorter than 94% of counties in Iowa.
At 36% higher than the state level, the 15.6% congestion ratio signals more pronounced congestion - expect slower peak-hour deliveries and less predictable arrival times.
| Traffic | vehicles per day16,237 |
|---|---|
| Trucks | 17.6% |
| Average travel time | 44.6 min |
| Congestion ratio | 32.8% |
| Drivers’ average age | 42.6 yrs |
| Drivers’ average income | $89,327 |
Highways carry about half of all travel in Johnson County, Iowa, 50% of vehicle-miles. The average highway carries 16,237 vehicles per day, 253% more than the average non-highway road in the same area, which carries 4,596 vehicles per day.
Highways make up 17% of the monitored road miles (102 miles, 173 segments), so they carry more than their share: 1,774,877 vehicle-miles traveled per day (≈648 million per year).
That puts Johnson among the top 3 counties in Iowa for highway travel volume.
The concentration of trucks on highways (17.6%) is 9% higher than the state average for similar road classifications. The highway traffic mix is typical for Iowa: neither freight- nor commuter-dominated.
By truck concentration, highways here outrank 71% of counties in Iowa. 99% of counties in Iowa see fewer highway trucks per day than Johnson's roughly 2,851.
| Traffic | vehicles per day4,596 |
|---|---|
| Trucks | 5.6% |
| Average travel time | 29.8 min |
| Congestion ratio | 15.3% |
| Drivers’ average age | 38.1 yrs |
| Drivers’ average income | $96,267 |
Local roads carry about half of all travel in Johnson County, Iowa, 50% of vehicle-miles. A typical local road sees 4,596 vehicles per day.
Local roads make up 83% of the monitored road miles (489 miles in 9,356 segments) but carry less than their share of travel: 1,781,069 vehicle-miles traveled per day (≈650 million per year). About 1 in 18 vehicles on non-highway roads is a truck (5.6%).
The concentration of trucks on non-highway roads is 68% lower than on highways.
At 37% higher than the state level, the non-highway congestion ratio of 15.3% signals more friction on local roads.
Johnson's average driver income is higher than 97% of counties in Iowa. The driver population here skews younger than 99% of counties in Iowa.
Mobile device location data (anonymized and aggregated)
Road sensor networks and traffic counters
Historical traffic pattern databases
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