ZIP 99174 (Steptoe, WA) truck route planning & crash data
Plan safer truck routes around ZIP 99174: commercial truck and garbage truck crashes here and in Whitman 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
4 of 209 truck crashes since 2015.
Deadliest roads
How Whitman County compares with Washington
Whitman County against Washington and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Whitman County stands out
Full comparison
| Measure (2015–2025) | Whitman County | Washington | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 37.2 | 25.8 | 49.7 | 1.4× the state |
| Deaths per 100 crashes | 5.1 | 3.4 | 3.4 | 1.5× the state |
| Injuries per crash | 0.18 | 0.18 | 0.49 | same |
| Garbage-truck share | 2.0% | 2.2% | 2.3% | 8% below the state |
| On snow, slush or ice | 17.2% | 9.7% | 6.2% | 1.8× the state |
| Morning rush (6–10 am) | 24.8% | 24.8% | 23.7% | same |
| In rain, sleet or snow | 12.1% | 20.2% | 13.8% | 40% below the state |
| Winter months (Nov–Mar) | 44.4% | 43.8% | 41.9% | same |
| After dark | 16.2% | 25.2% | 24.8% | 36% below the state |
Compared with Washington, Whitman County is lower on garbage-truck share, in rain, sleet or snow and after dark. It stands out for higher crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
The headline for Whitman County: 17.2% share of truck crashes on snow, slush or ice (Washington: 9.7%).
Overview
Police reported 209 crashes involving commercial trucks in Whitman County since 2015: 38 people were injured and 11 were killed.
That averages about one truck crash every 20 days in fully reported years.
When crashes happen
August has the most truck crashes, 14.8% of the yearly total, while June has the fewest (4.8%).
November through March accounts for 44.4% of truck crashes here, compared with 43.8% in Washington.
By time of day, 2–3 pm stands out with 10.5% of truck crashes.
17.2% of truck crashes here happened on snow, slush or ice, against 9.7% across Washington.
Where crashes happen
Since 2015, fatal crashes with a large truck within 10 miles of ZIP 99174 happened on US-195 (1); no road leads clearly.
Garbage & waste trucks
Garbage and refuse trucks were involved in 4 crashes, 1.9% of the total, against 2.2% across Washington.
Route planning tips for ZIP 99174 fleets
- Build extra time into August routes: it has the most truck crashes here.
- With 17.2% of truck crashes on snow, slush or ice (above Washington), plan winter equipment checks early.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
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 Whitman County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-195 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Whitman County) |
|---|---|
| Sr-128*001.00 | 3 |
| Sr-195*000.50 | 3 |
| Farmington Rd/Sr-27 | 2 |
| Sr-128*000.50 | 2 |
| Sr-194*003.00 | 2 |
| Sr-195*002.00 | 2 |
| Sr-195*018.00 | 2 |
| Sr-195*036.50 | 2 |
ZIP 99174 at a glance
| Population | 69 |
| Density | 976 per sq mi |
| Median household income | $50,179 |
| Median home value | $212,609 |
| Home ownership | 88% |
Waste facilities and haulers nearby
Historical data: truck crashes in Whitman 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 | — | 0.6 |
| 2000s | 14 | +93% | 0.8 |
| 2010s | 17 | +21% | 0.9 |
| 2020s | 16 | -4% | 1.0 |
Reported truck crashes averaged 7 a year in the 1990s and 16 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 1.2 fatal large-truck crashes a year in 2016–19 and 1.0 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 99174
How many truck accidents are there in ZIP 99174?
209 truck crashes have been reported in Whitman County since 2015, with 11 deaths and 38 injuries.
When do most truck crashes happen in ZIP 99174?
The worst month is August: 14.8% of truck crashes in Whitman County happen then.
How many garbage truck accidents happen in ZIP 99174?
Since 2015, Whitman County has reported 4 garbage-truck crashes, or 1.9% of its truck crashes.
How do truck crashes in ZIP 99174 compare with Washington?
Per 100,000 residents, Whitman County has 37.2 truck crashes a year; Washington has 25.8.
What is the best way to plan truck routes in ZIP 99174?
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.