ZIP 51247 (Rock Valley, IA) truck route planning & crash data
Plan safer truck routes around ZIP 51247: commercial truck and garbage truck crashes here and in Sioux 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
3 of 401 truck crashes since 2015.
Deadliest roads
How Sioux County compares with Iowa
Sioux County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Sioux County stands out
Full comparison
| Measure (2015–2025) | Sioux County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 94.5 | 68.1 | 49.7 | 1.4× the state |
| Deaths per 100 crashes | 3.7 | 3.5 | 3.4 | same |
| Injuries per crash | 0.58 | 0.41 | 0.49 | 1.4× the state |
| Garbage-truck share | 0.8% | 2.2% | 2.3% | 64% below the state |
| On snow, slush or ice | 21.1% | 18.7% | 6.2% | 1.1× the state |
| Morning rush (6–10 am) | 25.3% | 24.0% | 23.7% | same |
| In rain, sleet or snow | 10.8% | 15.1% | 13.8% | 29% below the state |
| Winter months (Nov–Mar) | 45.3% | 45.4% | 41.9% | same |
| After dark | 20.5% | 23.1% | 24.8% | 11% below the state |
Compared with Iowa, Sioux County is lower on garbage-truck share, in rain, sleet or snow and after dark. It stands out for higher crashes per 100k residents / yr, injuries per crash and on snow, slush or ice.
What stands out in Sioux County: 1 in 127 crashes involve a garbage truck (3 since 2015), vs 2.2% across Iowa.
Overview
Since 2015, 401 crashes involving commercial trucks have been reported in Sioux County. They injured 233 people and killed 16.
Across the years with complete reporting, that is roughly one truck crash every 11 days.
When crashes happen
Truck crashes peak in January (11.0% of the year) and are lowest in February (5.2%).
November through March accounts for 45.3% of truck crashes here, compared with 45.4% in Iowa.
More truck crashes happen at 11 am–12 pm than at any other hour (9.5%).
Snow, slush or ice was on the road in 21.1% of truck crashes, compared with 18.7% in Iowa.
Where crashes happen
Fatal large-truck crashes within 10 miles of ZIP 51247 since 2015 were spread across roads: CR-B14 305Th St (1), CR-B30/340TH St (1), CR-B40 390 St (1) and US-75 (1).
Garbage & waste trucks
Garbage and refuse trucks were involved in 3 crashes, 0.7% of the total, against 2.2% across Iowa.
Route planning tips for ZIP 51247 fleets
- Build extra time into January routes: it has the most truck crashes here.
- With 21.1% of truck crashes on snow, slush or ice (above Iowa), plan winter equipment checks early.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
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 Sioux County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| CR-B14 305Th St | 1 |
| CR-B30/340TH St | 1 |
| CR-B40 390 St | 1 |
| US-75 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Sioux County) |
|---|---|
| Ia 60 | 12 |
| State 60/Iowa 60 And K064/Jack | 8 |
| US-18 | 8 |
| US-75 | 6 |
| State 60/Iowa 60 | 6 |
| Ia 10 | 4 |
| Fig Ave | 4 |
| State 10/450Th St And Us 75 | 4 |
ZIP 51247 at a glance
| Population | 5,094 |
| Density | 18 per sq mi |
| Median household income | $78,358 |
| Median home value | $262,163 |
| Home ownership | 61% |
Waste facilities and haulers nearby
Historical data: truck crashes in Sioux 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 | 11 | — | 1.3 |
| 2000s | 26 | +135% | 1.8 |
| 2010s | 34 | +31% | 1.1 |
| 2020s | 34 | -1% | 1.2 |
Reported truck crashes averaged 11 a year in the 1990s and 34 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. Fatal large-truck crashes: 1.0 a year in 2016–19, 1.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 51247
How many truck accidents are there in ZIP 51247?
401 truck crashes have been reported in Sioux County since 2015, with 16 deaths and 233 injuries.
Which month has the most truck crashes in ZIP 51247?
Truck crashes in Sioux County peak in January, with 11.0% of the year's crashes.
How many garbage truck crashes are there in ZIP 51247?
Since 2015, Sioux County has reported 3 garbage-truck crashes, or 0.7% of its truck crashes.
How does ZIP 51247 compare with Iowa for truck crashes?
The yearly rate is 94.5 truck crashes per 100,000 residents in Sioux County, vs 68.1 for Iowa.
What is the best way to plan truck routes in ZIP 51247?
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.