Sun Prairie, MT truck route planning & crash data
Plan safer truck routes in Sun Prairie: commercial truck and garbage truck crashes in Sun Prairie and Cascade County, dangerous roads, seasonality and route safety data for fleets. Patterns use Cascade County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
4 of 268 truck crashes since 2015.
Deadliest roads
How Cascade County compares with Montana
Cascade County against Montana and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Cascade County stands out
Full comparison
| Measure (2015–2025) | Cascade County | Montana | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 27.7 | 64.3 | 49.7 | 57% below the state |
| Deaths per 100 crashes | 5.8 | 3.8 | 3.4 | 1.5× the state |
| Injuries per crash | 0.28 | 0.34 | 0.49 | 18% below the state |
| Garbage-truck share | 1.6% | 0.9% | 2.3% | 1.7× the state |
| On snow, slush or ice | 36.0% | 39.4% | 6.2% | 8% below the state |
| Morning rush (6–10 am) | 27.5% | 22.9% | 23.7% | 1.2× the state |
| In rain, sleet or snow | 21.3% | 20.6% | 13.8% | same |
| Winter months (Nov–Mar) | 55.0% | 54.3% | 41.9% | same |
| After dark | 28.3% | 30.8% | 24.8% | 8% below the state |
Cascade County sits below Montana on crashes per 100k residents / yr, injuries per crash and on snow, slush or ice. Where it is higher: deaths per 100 crashes, garbage-truck share and morning rush (6–10 am).
Cascade County at a glance: 1 in 65 garbage-truck share of crashes is 1.6%, against 0.9% for Montana.
Overview
Since 2015, 268 crashes involving commercial trucks have been reported in Cascade County. They injured 74 people and killed 15.
Across the years with complete reporting, that is roughly one truck crash every 16 days.
Sun Prairie had 0 reported truck crashes since 2015, too few for reliable patterns, so the charts and findings on this page use Cascade County numbers.
87% of truck crash reports in Cascade 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 12.7% of truck crashes; the quietest is April at 4.1%.
November through March accounts for 55.0% of truck crashes here, compared with 54.3% in Montana.
More truck crashes happen at 9–10 am than at any other hour (10.1%).
Road surface: 36.0% of truck crashes were on snow, slush or ice (Montana: 39.4%).
Where crashes happen
Within this area, I-15 had the most fatal crashes involving a large truck since 2015 (3). It is followed by Central Ave W (1) and Lr- Central Ave W (1).
Garbage & waste trucks
4 crashes involved a garbage or refuse truck, a 1.5% share (Montana: 0.9%).
Route planning tips for Sun Prairie fleets
- Plan January schedules with more margin; it is the worst month for truck crashes in Cascade County.
- Where you can, review stops along I-15; it has the most fatal large-truck crashes nearby.
- The morning rush (6–10 am) holds 27.5% of truck crashes here, more than Montana; adjust start times where you can.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
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 Cascade County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| I-15 | 3 |
| Central Ave W | 1 |
| Lr- Central Ave W | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Cascade County) |
|---|---|
| Mm 1.9 Us Highway 87E | 2 |
| 23Rd St S & 10Th Ave | 1 |
| 87.5 Eb Us Hwy 87/89E | 1 |
| I-15 Nb Mp 278 | 1 |
| I-15 Sb Mp 254 | 1 |
| Lower River Rd | 1 |
| Mm 5.4 Us Highway 89/Montana 200 | 1 |
| Mm 59.6 Us 89S | 1 |
Sun Prairie at a glance
| Land area | 5.3 sq mi |
Waste facilities and haulers nearby
Historical data: truck crashes in Cascade 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 | — | — | 0.6 |
| 2000s | 21 | — | 0.4 |
| 2010s | 25 | +19% | 0.7 |
| 2020s | 20 | -19% | 2.0 |
In the 2000s about 21 truck crashes a year were reported; in the 2020s, about 20. Reporting coverage also changed between these periods. Fatal crashes involving a large truck averaged 1.0 a year in 2016–19 and 2.0 a year in 2020–24.
Nearby places
Questions fleets ask about Sun Prairie
How many truck crashes happen in Sun Prairie?
268 truck crashes have been reported in Cascade County since 2015, with 15 deaths and 74 injuries.
Which road has the most fatal truck crashes in Sun Prairie?
NHTSA data shows I-15 with 3 fatal large-truck crashes within 10 miles of Sun Prairie since 2015, the highest of any road.
When do most truck crashes happen in Sun Prairie?
The worst month is January: 12.7% of truck crashes in Cascade County happen then.
How many garbage truck crashes are there in Sun Prairie?
Garbage trucks were involved in 4 reported crashes in Cascade County since 2015 (1.5% of truck crashes).
What is the truck crash rate in Sun Prairie compared with Montana?
Cascade County records 27.7 truck crashes per 100,000 residents a year, against 64.3 across Montana.
What is the best way to plan truck routes in Sun Prairie?
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.