This page delivers traffic analytics for Plymouth County, Iowa. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Plymouth County, Iowa among 506 road miles divided in 3,365 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 794 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
1,934
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
9.3%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
34.5 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
8.3%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.1 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$83,159
Our data indicates an estimated average traffic volume of 1,934 vehicles per day in Plymouth County, Iowa that results in 804,177 vehicle-miles traveled per day (≈294 million per year). The traffic stream is comprised of an average of 1 truck for every 11 vehicles. Typical time spent behind the wheel per trip is 34.5 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Iowa state averages: At 1,934 vehicles per day, the average monitored road in Plymouth carries 36% less traffic than the state average of 3,042 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 804,177 vehicle-miles traveled per day (≈294 million per year), roughly 1.0% of Iowa's statewide total. The average trip takes 34.5 minutes, 5% higher than the state level. At 27% lower than the state level, the 8.3% congestion ratio signals smoother traffic flow - crucial for traffic control improvement and logistics planning. 64% of counties in Iowa see less traffic than Plymouth's 1,934 vehicles per day. 63% of counties in Iowa have a shorter average travel time than Plymouth's 34.5 minutes.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
6,644
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
11.8%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
41.6 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
13.1%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$84,567
A significant volume of traffic in Plymouth County, Iowa utilizes the highway network. The average highway carries 6,644 vehicles per day, 305% more than the average non-highway road in the same area, which carries 1,639 vehicles per day. That average covers 57 highway road miles divided in 198 segments (average segment length 1,509 ft), together carrying 287,664 vehicle-miles traveled per day (≈105 million per year). Trucks constitute 11.8% of highway traffic.
Analytical insight
The concentration of trucks on highways (11.8%) is 27% lower than the state average for similar road classifications. This indicates Plymouth serves as a primarily local traffic hub. For logistics operators, this validates the importance of local access. 17% of counties in Iowa see a lower highway truck share than Plymouth's 11.8%. 42% of counties in Iowa see fewer highway trucks per day than Plymouth's roughly 786.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
1,639
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.9%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
34.1 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
8.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$82,388
The non-highway road network in Plymouth County, Iowa supports a substantial volume of traffic. The average non-highway road carries 1,639 vehicles per day, 75% less than the average highway in the same area, which carries 6,644 vehicles per day. That average covers 450 non-highway road miles divided in 3,167 segments (average segment length 749 ft), together carrying 516,512 vehicle-miles traveled per day (≈189 million per year). Trucks constitute 7.9% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 33% fewer trucks by share. The non-highway congestion ratio of 8.0% is 28% lower than the state level, suggesting more efficient local mobility than the state average. 63% of counties in Iowa see shorter overall travel times than Plymouth. Trip origins here have higher average income than 89% of counties in Iowa. The driver population here skews older than 15% of counties in Iowa.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 4:00 PM–7:00 PM, with volumes reaching approximately 73% higher than the daily average.
Weekend traffic:
Weekend volumes run about 30% above weekday levels.
Seasonal Fluctuation
Busy season:
January–March is the high season, with volumes +40% versus the annual average.
Lowest month:
June is the quietest month, with volumes -81% versus the annual average.
Analytical insight
In Plymouth County, Iowa, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +40% in high season.
Traffic Flow Profile Comparison
Metric
Plymouth
Iowa
Average
Difference
Traffic
1,934
3,042
-36.4%
Truck % (Total Traffic)
9.3%
11.0%
-15.3%
Truck % (Highway)
11.8%
16.1%
-26.5%
Avg. Travel Time
34.5 min
33.0 min
+4.6%
Frequently Asked Questions
The average daily traffic volume is calculated at 1,934 vehicles per day, providing a baseline for daily operations and site assessment.
The driver population in Plymouth skews older than 15% of counties in Iowa.
Drivers on Plymouth roads have a median age of 46 years, and the median household income of the neighborhoods trips originate from averages $83,159 - useful context for retail siting and customer profiling.
The average travel time for drivers is 34.5 minutes, offering a standard metric for commute and delivery route planning.
Traffic volumes are typically 40% higher during January–March. Volumes drop to their lowest levels in June, averaging 362 vehicles per day - a 81% decrease from the annual average.
Approximately 37% of highway traffic and 6% of non-highway traffic consists of vehicles whose trip originates outside Plymouth County, Iowa. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
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)
