Griswold, IA truck route planning & crash data
Plan safer truck routes in Griswold: commercial truck and garbage truck crashes in Griswold and Cass County, dangerous roads, seasonality and route safety data for fleets. Patterns use Cass County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
0 of 388 truck crashes since 2015.
Deadliest roads
How Cass County compares with Iowa
Cass County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Cass County stands out
Full comparison
| Measure (2015–2025) | Cass County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 245.0 | 68.1 | 49.7 | 3.6× the state |
| Deaths per 100 crashes | 6.0 | 3.5 | 3.4 | 1.7× the state |
| Injuries per crash | 0.39 | 0.41 | 0.49 | same |
| Garbage-truck share | 0.0% | 2.2% | 2.3% | 100% below the state |
| On snow, slush or ice | 25.4% | 18.7% | 6.2% | 1.4× the state |
| Morning rush (6–10 am) | 23.1% | 24.0% | 23.7% | same |
| In rain, sleet or snow | 21.1% | 15.1% | 13.8% | 1.4× the state |
| Winter months (Nov–Mar) | 49.3% | 45.4% | 41.9% | 1.1× the state |
| After dark | 41.0% | 23.1% | 24.8% | 1.8× the state |
Compared with Iowa, Cass County is lower on garbage-truck share. It stands out for higher crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
What stands out in Cass County: 0 of truck crashes here involve garbage trucks: 0.0%, vs 2.2% in Iowa.
Overview
Since 2015, 388 crashes involving commercial trucks have been reported in Cass County. They injured 178 people and killed 24.
That averages about one truck crash every 11 days in fully reported years.
Only 3 truck crashes were reported in Griswold since 2015; patterns below come from Cass County as a whole.
76% of truck crash reports in Cass County since 2015 leave the city field blank; place counts include only reports that name the place.
When crashes happen
The worst month is January with 14.7% of truck crashes; the quietest is December at 5.2%.
November through March accounts for 49.3% of truck crashes here, compared with 45.4% in Iowa.
More truck crashes happen at 9–10 am than at any other hour (6.4%).
25.4% of truck crashes here happened on snow, slush or ice, against 18.7% across Iowa.
Where crashes happen
Since 2015, fatal crashes with a large truck within 10 miles of Griswold happened on SR-92 (1) and US-6 (1); no road leads clearly.
Garbage & waste trucks
Since 2015, no garbage-truck crashes were reported for Cass County.
Route planning tips for Griswold fleets
- Review driver schedules for January, the month with the most truck crashes.
- With 25.4% 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
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 Cass County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-92 | 1 |
| US-6 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Cass County) |
|---|---|
| I-80 | 37 |
| Interstate 80/I 80 | 10 |
| I 80 Wb Mm59 | 5 |
| Olive St | 4 |
| I 80 W 59Mm | 4 |
| I 80 E 60Mm | 3 |
| Us 6/White Pole Rd | 3 |
| US-71 | 3 |
Griswold at a glance
| Population | 975 |
| Land area | 0.6 sq mi |
| Density | 1,601 per sq mi |
| Median household income (ZIP 51535) | $76,371 |
| Median home value (ZIP 51535) | $151,573 |
Waste facilities and haulers nearby
Historical data: truck crashes in Cass 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 | 16 | — | 0.5 |
| 2000s | 15 | -2% | 0.5 |
| 2010s | 26 | +69% | 1.0 |
| 2020s | 36 | +36% | 0.8 |
In the 1990s about 16 truck crashes a year were reported; in the 2020s, about 36. Reporting coverage also changed between these periods. Fatal crashes involving a large truck averaged 1.2 a year in 2016–19 and 0.8 a year in 2020–24.
Nearby places
Questions fleets ask about Griswold
How common are truck crashes in Griswold?
388 truck crashes have been reported in Cass County since 2015, with 24 deaths and 178 injuries.
Which month has the most truck crashes in Griswold?
January has the most truck crashes in Cass County, 14.7% of the yearly total.
Are garbage truck crashes common in Griswold?
Garbage trucks were involved in 0 reported crashes in Cass County since 2015 (0.0% of truck crashes).
What is the truck crash rate in Griswold compared with Iowa?
The yearly rate is 245.0 truck crashes per 100,000 residents in Cass County, vs 68.1 for Iowa.
How can I plan a safer truck route in Griswold?
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.