Sinai, SD truck route planning & crash data
Plan safer truck routes in Sinai: commercial truck and garbage truck crashes in Sinai and Brookings County, dangerous roads, seasonality and route safety data for fleets. Patterns use Brookings County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
2 of 157 truck crashes since 2015.
Deadliest roads
How Brookings County compares with South Dakota
Brookings County against South Dakota and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Brookings County stands out
Full comparison
| Measure (2015–2025) | Brookings County | South Dakota | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 37.0 | 42.0 | 49.7 | 12% below the state |
| Deaths per 100 crashes | 2.7 | 5.2 | 3.4 | 48% below the state |
| Injuries per crash | 0.12 | 0.13 | 0.49 | 8% below the state |
| Garbage-truck share | 1.4% | 1.6% | 2.3% | 16% below the state |
| On snow, slush or ice | 28.4% | 28.6% | 6.2% | same |
| Morning rush (6–10 am) | 24.3% | 22.2% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 15.5% | 17.5% | 13.8% | 11% below the state |
| Winter months (Nov–Mar) | 49.3% | 48.8% | 41.9% | same |
| After dark | 16.9% | 22.8% | 24.8% | 26% below the state |
Compared with South Dakota, Brookings County is lower on crashes per 100k residents / yr, deaths per 100 crashes and injuries per crash. Where it is higher: morning rush (6–10 am).
The headline for Brookings County: March the month with the most truck crashes: 13.4% of the year's total.
Overview
Police reported 157 crashes involving commercial trucks in Brookings County since 2015: 19 people were injured and 5 were killed.
In complete reporting years that works out to about one truck crash every 27 days.
Only 0 truck crashes were reported in Sinai since 2015; patterns below come from Brookings County as a whole.
When crashes happen
The worst month is March with 13.4% of truck crashes; the quietest is April at 4.5%.
Winter months (Nov–Mar) carry 49.3% of truck crashes, vs 48.8% for South Dakota.
By time of day, 9–10 am stands out with 12.1% of truck crashes.
Road surface: 28.4% of truck crashes were on snow, slush or ice (South Dakota: 28.6%).
Where crashes happen
Since 2015, fatal crashes with a large truck within 10 miles of Sinai happened on US-14 (1); no road leads clearly.
Garbage & waste trucks
Garbage trucks account for 2 of the truck crashes here, or 1.3%, compared with 1.6% in South Dakota.
Route planning tips for Sinai fleets
- Plan March schedules with more margin; it is the worst month for truck crashes in Brookings County.
- Morning starts matter: 24.3% of truck crashes fall between 6 and 10 am, higher than South Dakota.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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 Brookings County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-14 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Brookings County) |
|---|---|
| I-29 | 54 |
| US-14 | 32 |
| Ave | 27 |
| Sd Hwy 324 | 4 |
| Us Hwy 14 B | 4 |
| 22Nd Ave | 3 |
| Sd Hwy 30 | 3 |
| 8Th St | 2 |
Sinai at a glance
| Population | 100 |
| Land area | 0.4 sq mi |
| Density | 272 per sq mi |
| Median household income (ZIP 57061) | $56,875 |
Waste facilities and haulers nearby
Historical data: truck crashes in Brookings 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 | 6 | — | 0.7 |
| 2000s | 7 | +29% | 0.4 |
| 2010s | 11 | +58% | 0.4 |
| 2020s | 16 | +43% | 0.2 |
In the 1990s about 6 truck crashes a year were reported; in the 2020s, about 16. Reporting coverage also changed between these periods. Fatal large-truck crashes: 0.5 a year in 2016–19, 0.2 a year in 2020–24.
Nearby places
Questions fleets ask about Sinai
How common are truck crashes in Sinai?
Since 2015, 157 crashes involving commercial trucks were reported in Brookings County (19 injured, 5 killed).
Which month has the most truck crashes in Sinai?
The worst month is March: 13.4% of truck crashes in Brookings County happen then.
Are garbage truck crashes common in Sinai?
Garbage trucks were involved in 2 reported crashes in Brookings County since 2015 (1.3% of truck crashes).
What is the truck crash rate in Sinai compared with South Dakota?
Brookings County records 37.0 truck crashes per 100,000 residents a year, against 42.0 across South Dakota.
How do I plan a garbage truck route in Sinai?
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.