Reliance, SD truck route planning & crash data
Plan safer truck routes in Reliance: commercial truck and garbage truck crashes in Reliance and Lyman County, dangerous roads, seasonality and route safety data for fleets. Patterns use Lyman County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
0 of 139 truck crashes since 2015.
Deadliest roads
How Lyman County compares with South Dakota
Lyman County against South Dakota and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Lyman County stands out
Full comparison
| Measure (2015–2025) | Lyman County | South Dakota | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 320.1 | 42.0 | 49.7 | 7.6× the state |
| Deaths per 100 crashes | 5.3 | 5.2 | 3.4 | same |
| Injuries per crash | 0.12 | 0.13 | 0.49 | 8% below the state |
| Garbage-truck share | 0.0% | 1.6% | 2.3% | 100% below the state |
| On snow, slush or ice | 40.5% | 28.6% | 6.2% | 1.4× the state |
| Morning rush (6–10 am) | 19.1% | 22.2% | 23.7% | 14% below the state |
| In rain, sleet or snow | 24.4% | 17.5% | 13.8% | 1.4× the state |
| Winter months (Nov–Mar) | 55.7% | 48.8% | 41.9% | 1.1× the state |
| After dark | 35.1% | 22.8% | 24.8% | 1.5× the state |
Lyman County has lower values than South Dakota for injuries per crash, garbage-truck share and morning rush (6–10 am). It runs above South Dakota on crashes per 100k residents / yr, on snow, slush or ice and in rain, sleet or snow.
Lyman County at a glance: January the month with the most truck crashes: 20.1% of the year's total.
Overview
Police reported 139 crashes involving commercial trucks in Lyman County since 2015: 25 people were injured and 14 were killed.
In complete reporting years that works out to about one truck crash every 31 days.
With 0 truck crashes reported in Reliance since 2015, this page uses Lyman County numbers for its patterns and comparisons.
When crashes happen
January has the most truck crashes, 20.1% of the yearly total, while February has the fewest (3.6%).
Winter months (Nov–Mar) carry 55.7% of truck crashes, vs 48.8% for South Dakota.
More truck crashes happen at 8–9 am than at any other hour (7.9%).
40.5% of truck crashes here happened on snow, slush or ice, against 28.6% across South Dakota.
Where crashes happen
Roads with fatal crashes involving a large truck within 10 miles of Reliance since 2015: I-90 (2). No single road stands out.
Garbage & waste trucks
FMCSA lists no garbage-truck crashes in Lyman County since 2015.
Route planning tips for Reliance fleets
- Plan January schedules with more margin; it is the worst month for truck crashes in Lyman County.
- Icy and snowy roads show up in 40.5% of truck crashes here, more than South Dakota; 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 Lyman County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| I-90 | 2 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Lyman County) |
|---|---|
| I-90 | 89 |
| Sd Hwy 47 | 22 |
| US-83 | 10 |
| Sd Hwy 248 | 3 |
| 0.169 Miles W Of 324 Ave | 2 |
| Ave | 2 |
| Sd Hwy 273 | 2 |
| US-183 | 2 |
Reliance at a glance
| Population | 127 |
| Land area | 1.1 sq mi |
| Density | 117 per sq mi |
| Median household income (ZIP 57569) | $74,722 |
| Median home value (ZIP 57569) | $126,495 |
Historical data: truck crashes in Lyman 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 | 7 | — | 0.4 |
| 2000s | 8 | +19% | 0.2 |
| 2010s | 9 | +18% | 0.3 |
| 2020s | 14 | +47% | 0.4 |
Reported truck crashes averaged 7 a year in the 1990s and 14 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 0.5 a year in 2016–19 and 0.4 a year in 2020–24.
Nearby places
Questions fleets ask about Reliance
How many truck crashes happen in Reliance?
Since 2015, 139 crashes involving commercial trucks were reported in Lyman County (25 injured, 14 killed).
What is the worst month for truck crashes in Reliance?
Truck crashes in Lyman County peak in January, with 20.1% of the year's crashes.
How many garbage truck crashes are there in Reliance?
0 crashes involving garbage or refuse trucks have been reported in Lyman County since 2015, 0.0% of all truck crashes.
What is the truck crash rate in Reliance compared with South Dakota?
Lyman County records 320.1 truck crashes per 100,000 residents a year, against 42.0 across South Dakota.
How can I plan a safer truck route in Reliance?
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.