Sweet Grass County, MT truck route planning & crash data
Plan safer truck routes in Sweet Grass 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
0 of 291 truck crashes since 2015.
Deadliest roads
No fatal large-truck crashes with a road name recorded here since 2015.
How Sweet Grass County compares with Montana
Sweet Grass County against Montana and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Sweet Grass County stands out
Full comparison
| Measure (2015–2025) | Sweet Grass County | Montana | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 675.1 | 64.3 | 49.7 | 10.5× the state |
| Deaths per 100 crashes | 0.7 | 3.8 | 3.4 | 82% below the state |
| Injuries per crash | 0.24 | 0.34 | 0.49 | 29% below the state |
| Garbage-truck share | 0.0% | 0.9% | 2.3% | 100% below the state |
| On snow, slush or ice | 64.9% | 39.4% | 6.2% | 1.6× the state |
| Morning rush (6–10 am) | 29.0% | 22.9% | 23.7% | 1.3× the state |
| In rain, sleet or snow | 26.5% | 20.6% | 13.8% | 1.3× the state |
| Winter months (Nov–Mar) | 66.7% | 54.3% | 41.9% | 1.2× the state |
| After dark | 32.6% | 30.8% | 24.8% | same |
Sweet Grass County sits below Montana on deaths per 100 crashes, injuries per crash and garbage-truck share. It runs above Montana on crashes per 100k residents / yr, on snow, slush or ice and morning rush (6–10 am).
The headline for Sweet Grass County: 0 crashes involve a garbage truck (0 since 2015), vs 0.9% across Montana.
Overview
Since 2015, 291 crashes involving commercial trucks have been reported in Sweet Grass County. They injured 71 people and killed 2.
Across the years with complete reporting, that is roughly one truck crash every 14 days.
When crashes happen
Truck crashes peak in December (15.5% of the year) and are lowest in August (2.1%).
Winter months (Nov–Mar) carry 66.7% of truck crashes, vs 54.3% for Montana.
More truck crashes happen at 8–9 am than at any other hour (10.0%).
Snow, slush or ice was on the road in 64.9% of truck crashes, compared with 39.4% in Montana.
Where crashes happen
Since 2015, no fatal large-truck crashes with a location were recorded in Sweet Grass County.
Garbage & waste trucks
FMCSA lists no garbage-truck crashes in Sweet Grass County since 2015.
Route planning tips for Sweet Grass County fleets
- Plan December schedules with more margin; it is the worst month for truck crashes in Sweet Grass County.
- Morning starts matter: 29.0% of truck crashes fall between 6 and 10 am, higher than Montana.
- Icy and snowy roads show up in 64.9% of truck crashes here, more than Montana; 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 Sweet Grass County
By hour of day
Most dangerous roads for trucks
No fatal crashes involving a large truck with a road name were recorded in Sweet Grass County since 2015.
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Sweet Grass County) |
|---|---|
| Mm368.8 Interstate 90 | 2 |
| Mm378.1 I90W | 2 |
| Mm 16.9 - Us Highway 191 | 1 |
| Mm 365.6 I90 | 1 |
| Mm 376.1 -I90 | 1 |
| Mm24.5 Us 191 | 1 |
| Mm27.5 Us 191 | 1 |
| Mm368.5 I90E | 1 |
Sweet Grass County at a glance
| Population | 3,757 |
| Land area | 1,855.5 sq mi |
| Density | 2 per sq mi |
| Median household income (ZIP average) | $77,645 |
Waste facilities and haulers nearby
Historical data: truck crashes in Sweet Grass 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 | — | — | 0.1 |
| 2000s | 11 | — | 0.5 |
| 2010s | 17 | +46% | 0.1 |
| 2020s | 28 | +68% | 0.0 |
In the 2000s about 11 truck crashes a year were reported; in the 2020s, about 28. Reporting coverage also changed between these periods.
Cities, towns & communities in Sweet Grass County
ZIP codes in Sweet Grass County
Nearby counties
Questions fleets ask about Sweet Grass County
How many truck accidents are there in Sweet Grass County?
Sweet Grass County has had 291 reported truck crashes since 2015, injuring 71 people and killing 2.
What is the worst month for truck crashes in Sweet Grass County?
The worst month is December: 15.5% of truck crashes in Sweet Grass County happen then.
How many garbage truck crashes are there in Sweet Grass County?
0 crashes involving garbage or refuse trucks have been reported in Sweet Grass County since 2015, 0.0% of all truck crashes.
What is the truck crash rate in Sweet Grass County compared with Montana?
The yearly rate is 675.1 truck crashes per 100,000 residents in Sweet Grass County, vs 64.3 for Montana.
What is the best way to plan truck routes in Sweet Grass County?
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.