Cassia County, ID truck route planning & crash data
Plan safer truck routes in Cassia County: commercial truck and garbage truck crashes, 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
4 of 462 truck crashes since 2015.
Deadliest roads
How Cassia County compares with Idaho
Cassia County against Idaho and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Cassia County stands out
Full comparison
| Measure (2015–2025) | Cassia County | Idaho | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 152.9 | 37.4 | 49.7 | 4.1× the state |
| Deaths per 100 crashes | 3.7 | 6.1 | 3.4 | 39% below the state |
| Injuries per crash | 0.65 | 0.55 | 0.49 | 1.2× the state |
| Garbage-truck share | 0.9% | 1.6% | 2.3% | 41% below the state |
| On snow, slush or ice | 23.3% | 16.0% | 6.2% | 1.5× the state |
| Morning rush (6–10 am) | 20.1% | 23.0% | 23.7% | 12% below the state |
| In rain, sleet or snow | 10.3% | 10.2% | 13.8% | same |
| Winter months (Nov–Mar) | 46.0% | 40.9% | 41.9% | 1.1× the state |
| After dark | 23.3% | 22.8% | 24.8% | same |
Cassia County has lower values than Idaho for deaths per 100 crashes, garbage-truck share and morning rush (6–10 am). Where it is higher: crashes per 100k residents / yr, injuries per crash and on snow, slush or ice.
The headline for Cassia County: US-30 deadliest road: 4 fatal truck crashes in Cassia County since 2015.
Overview
Cassia County has recorded 462 truck crashes since 2015, with 293 people injured and 16 killed.
In complete reporting years that works out to about one truck crash every 9 days.
When crashes happen
March has the most truck crashes, 10.8% of the yearly total, while May has the fewest (6.1%).
November through March accounts for 46.0% of truck crashes here, compared with 40.9% in Idaho.
The busiest hour is 12–1 pm, with 8.2% of truck crashes.
Road surface: 23.3% of truck crashes were on snow, slush or ice (Idaho: 16.0%).
Where crashes happen
Within this area, US-30 had the most fatal crashes involving a large truck since 2015 (4). It is followed by 1000 South Rd (1), 400 South Rd (1) and 800 West Rd (1).
Garbage & waste trucks
Garbage trucks account for 4 of the truck crashes here, or 0.9%, compared with 1.6% in Idaho.
Route planning tips for Cassia County fleets
- Build extra time into March routes: it has the most truck crashes here.
- Check whether your routes use US-30, the road with the most fatal truck crashes in this area.
- 23.3% of truck crashes were on snow, slush or ice, above Idaho; plan winter equipment checks before the season.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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 Cassia County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Cassia County) |
|---|---|
| US-30 | 4 |
| 1000 South Rd | 1 |
| 400 South Rd | 1 |
| 800 West Rd | 1 |
| Bedke Blvd | 1 |
| I-84 | 1 |
| SR-27 | 1 |
| SR-81 | 1 |
| Yale Rd | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Cassia County) |
|---|---|
| I-84 | 204 |
| US-30 | 30 |
| Sh 81 | 29 |
| I-86 | 26 |
| Sh 27 | 19 |
| South | 19 |
| Sh 77 | 18 |
| East | 13 |
Cassia County at a glance
| Population | 25,976 |
| Land area | 2,565.6 sq mi |
| Density | 10 per sq mi |
| Median household income (ZIP average) | $70,347 |
Waste facilities and haulers nearby
Historical data: truck crashes in Cassia 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 | 37 | — | 0.8 |
| 2000s | 42 | +14% | 0.8 |
| 2010s | 34 | -19% | 1.1 |
| 2020s | 37 | +8% | 1.2 |
Reported truck crashes averaged 37 a year in the 1990s and 37 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 1.2 a year in 2016–19 and 1.2 a year in 2020–24.
Cities, towns & communities in Cassia County
ZIP codes in Cassia County
Nearby counties
Questions fleets ask about Cassia County
How common are truck crashes in Cassia County?
462 truck crashes have been reported in Cassia County since 2015, with 16 deaths and 293 injuries.
What is the most dangerous road for trucks in Cassia County?
Since 2015, US-30 has had the most fatal large-truck crashes in Cassia County: 4.
Which month has the most truck crashes in Cassia County?
March has the most truck crashes in Cassia County, 10.8% of the yearly total.
How many garbage truck crashes are there in Cassia County?
4 crashes involving garbage or refuse trucks have been reported in Cassia County since 2015, 0.9% of all truck crashes.
How does Cassia County compare with Idaho for truck crashes?
Cassia County records 152.9 truck crashes per 100,000 residents a year, against 37.4 across Idaho.
What is the best way to plan truck routes in Cassia County?
Use the free Route Planner: enter your stops to get a risk score, safer alternatives and the low bridges on your route.
2026 is a partial year. Updated October 2026.