ZIP 57278 (Willow Lake, SD) truck route planning & crash data
Plan safer truck routes around ZIP 57278: commercial truck and garbage truck crashes here and in Clark County, 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 26 truck crashes since 2015.
Deadliest roads
No fatal large-truck crashes with a road name recorded here since 2015.
How Clark County compares with South Dakota
Clark County against South Dakota and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Clark County stands out
Full comparison
| Measure (2015–2025) | Clark County | South Dakota | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 52.6 | 42.0 | 49.7 | 1.3× the state |
| Deaths per 100 crashes | 26.1 | 5.2 | 3.4 | 5.0× the state |
| Injuries per crash | 0.26 | 0.13 | 0.49 | 2.0× the state |
| Garbage-truck share | 0.0% | 1.6% | 2.3% | 100% below the state |
| On snow, slush or ice | 13.0% | 28.6% | 6.2% | 54% below the state |
| Morning rush (6–10 am) | 21.7% | 22.2% | 23.7% | same |
| In rain, sleet or snow | 8.7% | 17.5% | 13.8% | 50% below the state |
| Winter months (Nov–Mar) | 34.8% | 48.8% | 41.9% | 29% below the state |
| After dark | 17.4% | 22.8% | 24.8% | 24% below the state |
Clark County has lower values than South Dakota for garbage-truck share, on snow, slush or ice and in rain, sleet or snow. Where it is higher: crashes per 100k residents / yr, deaths per 100 crashes and injuries per crash.
What stands out in Clark County: 26.1 deaths per 100 truck crashes, vs 5.2 in South Dakota.
Overview
Since 2015, 26 crashes involving commercial trucks have been reported in Clark County. They injured 6 people and killed 7.
Across the years with complete reporting, that is roughly one truck crash every 175 days.
When crashes happen
October has the most truck crashes, 26.9% of the yearly total, while June has the fewest (0.0%).
The five winter months (November to March) hold 34.8% of truck crashes, against 48.8% across South Dakota.
By time of day, 9–10 am stands out with 15.4% of truck crashes.
Road surface: 13.0% of truck crashes were on snow, slush or ice (South Dakota: 28.6%).
Where crashes happen
Since 2015, no fatal large-truck crashes with a location were recorded within 10 miles of ZIP 57278.
Garbage & waste trucks
FMCSA lists no garbage-truck crashes in Clark County since 2015.
Route planning tips for ZIP 57278 fleets
- Build extra time into October routes: it has the most truck crashes here.
- 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 Clark County
By hour of day
Most dangerous roads for trucks
No fatal crashes involving a large truck with a road name were recorded within 10 miles since 2015.
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Clark County) |
|---|---|
| US-212 | 8 |
| Sd Hwy 20 | 4 |
| Sd Hwy 25 | 4 |
| Ave | 3 |
| Sd Hwy 28 | 3 |
| 424Th Ave | 1 |
ZIP 57278 at a glance
| Population | 1,011 |
| Density | 2 per sq mi |
| Median household income | $70,208 |
| Median home value | $220,434 |
| Home ownership | 78% |
Historical data: truck crashes in Clark 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 | 1 | — | 0.3 |
| 2000s | 2 | +57% | 0.2 |
| 2010s | 3 | +23% | 0.1 |
| 2020s | 2 | -14% | 0.4 |
In the 1990s about 1 truck crash a year were reported; in the 2020s, about 2. Reporting coverage also changed between these periods. NHTSA counts 0.2 fatal large-truck crashes a year in 2016–19 and 0.4 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 57278
How many truck crashes happen in ZIP 57278?
Since 2015, 26 crashes involving commercial trucks were reported in Clark County (6 injured, 7 killed).
What is the worst month for truck crashes in ZIP 57278?
October has the most truck crashes in Clark County, 26.9% of the yearly total.
How many garbage truck crashes are there in ZIP 57278?
0 crashes involving garbage or refuse trucks have been reported in Clark County since 2015, 0.0% of all truck crashes.
How does ZIP 57278 compare with South Dakota for truck crashes?
Clark County records 52.6 truck crashes per 100,000 residents a year, against 42.0 across South Dakota.
How can I plan a safer truck route in ZIP 57278?
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.