ZIP 50579 (Rockwell City, IA) truck route planning & crash data
Plan safer truck routes around ZIP 50579: 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 |
Compared with Iowa, Calhoun County is lower on garbage-truck share and after dark. It runs above Iowa on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
The headline for Calhoun County: 0 of truck crashes here involve garbage trucks: 0.0%, vs 2.2% in Iowa.
Overview
Since 2015, 110 crashes involving commercial trucks have been reported in Calhoun County. They injured 50 people and killed 8.
That averages about one truck crash every 38 days in fully reported years.
When crashes happen
Truck crashes peak in January (12.7% of the year) and are lowest in March (4.5%).
The five winter months (November to March) hold 49.5% of truck crashes, against 45.4% across Iowa.
By time of day, 10–11 am stands out with 11.8% of truck crashes.
Road surface: 28.6% of truck crashes were on snow, slush or ice (Iowa: 18.7%).
Where crashes happen
Within this area, SR-4 had the most fatal crashes involving a large truck since 2015 (4). It is followed by US-20 (1).
Garbage & waste trucks
No crashes involving garbage or refuse trucks have been reported in Calhoun County since 2015.
Route planning tips for ZIP 50579 fleets
- Review driver schedules for January, the month with the most truck crashes.
- Check whether your routes use SR-4, the road with the most fatal truck crashes in this area.
- Icy and snowy roads show up in 28.6% of truck crashes here, more than Iowa; schedule winter checks early.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
About the data
This report uses the FMCSA crash file (reported crashes of trucks over 10,000 lb) and NHTSA FARS (fatal crashes). It reports the numbers without guessing at reasons.
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) |
|---|---|
| SR-4 | 4 |
| 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 50579 at a glance
| Population | 3,034 |
| Density | 8 per sq mi |
| Median household income | $61,108 |
| Median home value | $127,451 |
| Home ownership | 78% |
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. Fatal crashes involving a large truck averaged 0.5 a year in 2016–19 and 0.4 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 50579
How many truck accidents are there in ZIP 50579?
Calhoun County has had 110 reported truck crashes since 2015, injuring 50 people and killing 8.
What is the most dangerous road for trucks in ZIP 50579?
NHTSA data shows SR-4 with 4 fatal large-truck crashes within 10 miles of ZIP 50579 since 2015, the highest of any road.
What is the worst month for truck crashes in ZIP 50579?
January has the most truck crashes in Calhoun County, 12.7% of the yearly total.
How many garbage truck accidents happen in ZIP 50579?
Garbage trucks were involved in 0 reported crashes in Calhoun County since 2015 (0.0% of truck crashes).
How does ZIP 50579 compare with Iowa for truck crashes?
The yearly rate is 98.3 truck crashes per 100,000 residents in Calhoun County, vs 68.1 for Iowa.
How do I plan a garbage truck route in ZIP 50579?
The free Route Planner takes your stops and returns a route risk score, safer alternatives and low-bridge warnings.
2026 is a partial year. Updated October 2026.