Rock Valley, IA truck route planning & crash data
Plan safer truck routes in Rock Valley: commercial truck and garbage truck crashes in Rock Valley and Sioux County, dangerous roads, seasonality and route safety data for fleets. Patterns use Sioux County numbers.
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 |
Sioux County has lower values than Iowa for garbage-truck share, in rain, sleet or snow and after dark. It runs above Iowa on crashes per 100k residents / yr, injuries per crash and on snow, slush or ice.
What stands out in Sioux County: 1 in 127 of truck crashes here involve garbage trucks: 0.8%, vs 2.2% in Iowa.
Overview
Police reported 401 crashes involving commercial trucks in Sioux County since 2015: 233 people were injured and 16 were killed.
Across the years with complete reporting, that is roughly one truck crash every 11 days.
Only 18 truck crashes were reported in Rock Valley since 2015; patterns below come from Sioux County as a whole.
69% of truck crash reports in Sioux County since 2015 leave the city field blank; place counts include only reports that name the place.
When crashes happen
Truck crashes peak in January (11.0% of the year) and are lowest in February (5.2%).
Winter months (Nov–Mar) carry 45.3% of truck crashes, vs 45.4% for Iowa.
By time of day, 11 am–12 pm stands out with 9.5% of truck crashes.
21.1% 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 Rock Valley since 2015 were spread across roads: CR-B14 305Th St (1), CR-B30/340TH St (1), CR-B40 390 St (1), US-18 (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 Rock Valley fleets
- Build extra time into January routes: it has the most truck crashes here.
- 21.1% of truck crashes were on snow, slush or ice, above Iowa; plan winter equipment checks before the season.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
About the data
Sources: the FMCSA crash file for all reported truck crashes and NHTSA FARS for fatal crashes with a large truck. Every statement here comes straight from those numbers.
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-18 | 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 |
Rock Valley at a glance
| Population | 4,024 |
| Land area | 4.5 sq mi |
| Density | 902 per sq mi |
| Median household income (ZIP 51247) | $78,358 |
| Median home value (ZIP 51247) | $262,163 |
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. NHTSA counts 1.0 fatal large-truck crashes a year in 2016–19 and 1.2 a year in 2020–24.
Nearby places
Questions fleets ask about Rock Valley
How many truck accidents are there in Rock Valley?
Since 2015, 401 crashes involving commercial trucks were reported in Sioux County (233 injured, 16 killed).
Which month has the most truck crashes in Rock Valley?
The worst month is January: 11.0% of truck crashes in Sioux County happen then.
How many garbage truck crashes are there in Rock Valley?
Since 2015, Sioux County has reported 3 garbage-truck crashes, or 0.7% of its truck crashes.
How does Rock Valley compare with Iowa for truck crashes?
Per 100,000 residents, Sioux County has 94.5 truck crashes a year; Iowa has 68.1.
How can I plan a safer truck route in Rock Valley?
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.