ZIP 51446 (Irwin, IA) truck route planning & crash data
Plan safer truck routes around ZIP 51446: commercial truck and garbage truck crashes here and in Shelby 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
1 of 73 truck crashes since 2015.
Deadliest roads
How Shelby County compares with Iowa
Shelby County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Shelby County stands out
Full comparison
| Measure (2015–2025) | Shelby County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 53.1 | 68.1 | 49.7 | 22% below the state |
| Deaths per 100 crashes | 4.3 | 3.5 | 3.4 | 1.2× the state |
| Injuries per crash | 0.84 | 0.41 | 0.49 | 2.0× the state |
| Garbage-truck share | 1.5% | 2.2% | 2.3% | 33% below the state |
| On snow, slush or ice | 7.2% | 18.7% | 6.2% | 61% below the state |
| Morning rush (6–10 am) | 31.9% | 24.0% | 23.7% | 1.3× the state |
| In rain, sleet or snow | 7.2% | 15.1% | 13.8% | 52% below the state |
| Winter months (Nov–Mar) | 43.5% | 45.4% | 41.9% | same |
| After dark | 15.9% | 23.1% | 24.8% | 31% below the state |
Shelby County has lower values than Iowa for crashes per 100k residents / yr, garbage-truck share and on snow, slush or ice. It runs above Iowa on deaths per 100 crashes, injuries per crash and morning rush (6–10 am).
What stands out in Shelby County: June 13.7% of truck crashes happen in June, more than any other month.
Overview
Shelby County has recorded 73 truck crashes since 2015, with 62 people injured and 4 killed.
In complete reporting years that works out to about one truck crash every 58 days.
When crashes happen
The worst month is June with 13.7% of truck crashes; the quietest is January at 1.4%.
November through March accounts for 43.5% of truck crashes here, compared with 45.4% in Iowa.
The busiest hour is 8–9 am, with 15.1% of truck crashes.
7.2% 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 51446 since 2015 were spread across roads: CR-F24/150TH St (1), CR-M47/FRONT St (1) and Nishna Ave (1).
Garbage & waste trucks
1 crash involved a garbage or refuse truck, a 1.4% share (Iowa: 2.2%).
Route planning tips for ZIP 51446 fleets
- Build extra time into June routes: it has the most truck crashes here.
- 31.9% of truck crashes happen between 6 and 10 am, above Iowa; consider earlier or later starts where possible.
- 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 Shelby County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| CR-F24/150TH St | 1 |
| CR-M47/FRONT St | 1 |
| Nishna Ave | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Shelby County) |
|---|---|
| US-59 | 9 |
| State 44/Chatburn Ave | 4 |
| 1500Th St And St F32 Unsigned | 3 |
| F032/Street F32 | 2 |
| Ia 191 | 2 |
| Ia 44 | 2 |
| Ia 44 East Of Exchange | 2 |
| State 37/Iowa 37 | 2 |
ZIP 51446 at a glance
| Population | 499 |
| Density | 5 per sq mi |
| Median household income | $62,750 |
| Median home value | $91,024 |
| Home ownership | 87% |
Waste facilities and haulers nearby
Historical data: truck crashes in Shelby 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 | — | 0.4 |
| 2000s | 2 | +53% | 0.3 |
| 2010s | 6 | +158% | 0.4 |
| 2020s | 6 | -9% | 0.2 |
From the 1990s to the 2020s, yearly reported truck crashes went from 2 to 6. Some of the change may reflect how crashes were reported. Fatal large-truck crashes: 0.8 a year in 2016–19, 0.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 51446
How many truck accidents are there in ZIP 51446?
73 truck crashes have been reported in Shelby County since 2015, with 4 deaths and 62 injuries.
Which month has the most truck crashes in ZIP 51446?
June has the most truck crashes in Shelby County, 13.7% of the yearly total.
How many garbage truck accidents happen in ZIP 51446?
Since 2015, Shelby County has reported 1 garbage-truck crash, or 1.4% of its truck crashes.
How does ZIP 51446 compare with Iowa for truck crashes?
The yearly rate is 53.1 truck crashes per 100,000 residents in Shelby County, vs 68.1 for Iowa.
How do I plan a garbage truck route in ZIP 51446?
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.