ZIP 50552 (Knierim, IA) truck route planning & crash data
Plan safer truck routes around ZIP 50552: commercial truck and garbage truck crashes here and in Calhoun County, dangerous roads, seasonality and route safety data for fleets.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
0 of 110 truck crashes since 2015.
Deadliest roads
How Calhoun County compares with Iowa
Calhoun County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Calhoun County stands out
Full comparison
| Measure (2015–2025) | Calhoun County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 98.3 | 68.1 | 49.7 | 1.4× the state |
| Deaths per 100 crashes | 7.6 | 3.5 | 3.4 | 2.2× the state |
| Injuries per crash | 0.42 | 0.41 | 0.49 | same |
| Garbage-truck share | 0.0% | 2.2% | 2.3% | 100% below the state |
| On snow, slush or ice | 28.6% | 18.7% | 6.2% | 1.5× the state |
| Morning rush (6–10 am) | 23.8% | 24.0% | 23.7% | same |
| In rain, sleet or snow | 20.9% | 15.1% | 13.8% | 1.4× the state |
| Winter months (Nov–Mar) | 49.5% | 45.4% | 41.9% | 1.1× the state |
| After dark | 20.0% | 23.1% | 24.8% | 13% below the state |
Calhoun County has lower values than Iowa for garbage-truck share and after dark. It stands out for higher crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
Calhoun County at a glance: 0 garbage-truck share of crashes is 0.0%, against 2.2% for Iowa.
Overview
Calhoun County has recorded 110 truck crashes since 2015, with 50 people injured and 8 killed.
That averages about one truck crash every 38 days in fully reported years.
When crashes happen
The worst month is January with 12.7% of truck crashes; the quietest is March at 4.5%.
The five winter months (November to March) hold 49.5% of truck crashes, against 45.4% across Iowa.
More truck crashes happen at 10–11 am than at any other hour (11.8%).
28.6% of truck crashes here happened on snow, slush or ice, against 18.7% across Iowa.
Where crashes happen
Fatal large-truck crashes within 10 miles of ZIP 50552 since 2015 were spread across roads: CR-D20/230TH St (1), CR-D36 (1) and US-20 (1).
Garbage & waste trucks
FMCSA lists no garbage-truck crashes in Calhoun County since 2015.
Route planning tips for ZIP 50552 fleets
- Build extra time into January routes: it has the most truck crashes here.
- 28.6% of truck crashes were on snow, slush or ice, above Iowa; plan winter equipment checks before the season.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
Crash counts come from the FMCSA crash file (police-reported crashes involving trucks over 10,000 lb); fatal-crash locations come from NHTSA FARS. Text on this page states only what these numbers show.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Calhoun County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| CR-D20/230TH St | 1 |
| CR-D36 | 1 |
| US-20 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Calhoun County) |
|---|---|
| US-20 | 14 |
| Us 20/Us20 | 10 |
| Ia 4 | 8 |
| Dakota Ave | 2 |
| Dakota Ave And Railway St | 2 |
| Ia 175 | 2 |
| N028/Dakota Ave And Us 20/Us20 | 2 |
| N065/Sigourney Ave And Us 20/U | 2 |
ZIP 50552 at a glance
| Population | 76 |
| Density | 59 per sq mi |
| Median household income | $89,000 |
| Home ownership | 88% |
Waste facilities and haulers nearby
Historical data: truck crashes in Calhoun County since the 1990s
Combines the FMCSA crash file (all reported truck crashes, real coverage from about 1990) with NHTSA FARS (fatal crashes involving a large truck, 1982–2024).
| Decade | Truck crashes / yr | Change | Fatal crashes / yr (FARS) |
|---|---|---|---|
| 1990s | 2 | — | 0.5 |
| 2000s | 5 | +185% | 0.3 |
| 2010s | 9 | +72% | 0.5 |
| 2020s | 10 | +10% | 0.4 |
Reported truck crashes averaged 2 a year in the 1990s and 10 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 0.5 fatal large-truck crashes a year in 2016–19 and 0.4 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 50552
How many truck accidents are there in ZIP 50552?
Calhoun County has had 110 reported truck crashes since 2015, injuring 50 people and killing 8.
Which month has the most truck crashes in ZIP 50552?
Truck crashes in Calhoun County peak in January, with 12.7% of the year's crashes.
How many garbage truck accidents happen in ZIP 50552?
0 crashes involving garbage or refuse trucks have been reported in Calhoun County since 2015, 0.0% of all truck crashes.
How does ZIP 50552 compare with Iowa for truck crashes?
Per 100,000 residents, Calhoun County has 98.3 truck crashes a year; Iowa has 68.1.
What is the best way to plan truck routes in ZIP 50552?
Paste your stops into the free CurbWaste Route Planner: it scores your route against fatal-crash locations, suggests safer alternatives and flags low bridges.
2026 is a partial year. Updated October 2026.