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Traffic | vehicles per day7,616 |
|---|---|
Trucks | 7.1% |
Average travel time | 32.6 min |
Congestion ratio | 21.2% |
Drivers’ average age | 43.0 yrs |
Drivers’ average income | $101,521 |
Our data shows 7,616 vehicles per day on the average road in Polk County, Iowa, and 12,248,010 vehicle-miles traveled per day (≈4.5 billion per year) across its 1,355 miles of monitored roads. About 1 in 14 vehicles is a truck, fewer than the 1 in 9 across Iowa.
At 7,616 vehicles per day, the average monitored road in Polk carries 150% more traffic than the state average of 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 15% of Iowa's statewide total. In fact, Polk has the highest average traffic volume of any county in Iowa, at 7,616 vehicles per day.
Journey times here (32.6 minutes on average) closely track the state level. 63% of counties in Iowa have a longer average travel time than Polk's 32.6 minutes.
At 85% higher than the state level, the 21.2% congestion ratio signals more pronounced congestion - expect markedly slower peak-hour deliveries and unreliable arrival times.
| Traffic | vehicles per day22,652 |
|---|---|
| Trucks | 11.0% |
| Average travel time | 35.4 min |
| Congestion ratio | 40.5% |
| Drivers’ average age | 43.5 yrs |
| Drivers’ average income | $100,997 |
Highways carry a significant share of travel in Polk County, Iowa: 42% of all vehicle-miles. The average highway carries 22,652 vehicles per day, 216% more than the average non-highway road in the same area, which carries 7,178 vehicles per day.
Highways make up 17% of the monitored road miles (230 miles, 881 segments), so they carry more than their share: 5,178,186 vehicle-miles traveled per day (≈1.9 billion per year).
By highway travel volume, Polk ranks first in Iowa.
Highway truck concentration here runs 32% lower than the state average, at 11.0%. Trucks are a small share of a very large highway flow, so Polk still moves heavy freight volumes alongside its passenger traffic.
Polk's highway truck share (11.0%) is lower than 88% of counties in Iowa. By raw truck volume, Polk carries more highway trucks than 91% of counties in Iowa.
| Traffic | vehicles per day7,178 |
|---|---|
| Trucks | 4.3% |
| Average travel time | 32.6 min |
| Congestion ratio | 20.6% |
| Drivers’ average age | 42.8 yrs |
| Drivers’ average income | $101,877 |
Local roads carry more than half of all travel in Polk County, Iowa (58% of vehicle-miles). A typical local road sees 7,178 vehicles per day.
Local roads make up 83% of the monitored road miles (1,124 miles in 30,241 segments) but carry less than their share of travel: 7,069,824 vehicle-miles traveled per day (≈2.6 billion per year). Trucks make up 4.3% of non-highway traffic, about 1 in 23 vehicles.
Compared to highways, non-highway routes see 61% fewer trucks by share.
The non-highway congestion ratio of 20.6% is 85% higher than the state level, suggesting slower local mobility than the state average.
Trip origins here have higher average income than 99% of counties in Iowa. 98% of counties in Iowa have an older driver population than Polk.
Mobile device location data (anonymized and aggregated)
Road sensor networks and traffic counters
Historical traffic pattern databases
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