Washington County, MO truck route planning & crash data
Plan safer truck routes in Washington County: commercial truck and garbage truck crashes, 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
5 of 191 truck crashes since 2015.
Deadliest roads
How Washington County compares with Missouri
Washington County against Missouri and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Washington County stands out
Full comparison
| Measure (2015–2025) | Washington County | Missouri | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 69.8 | 85.9 | 49.7 | 19% below the state |
| Deaths per 100 crashes | 6.6 | 2.7 | 3.4 | 2.4× the state |
| Injuries per crash | 0.80 | 0.44 | 0.49 | 1.8× the state |
| Garbage-truck share | 2.2% | 2.2% | 2.3% | same |
| On snow, slush or ice | 1.7% | 7.2% | 6.2% | 77% below the state |
| Morning rush (6–10 am) | 24.3% | 22.8% | 23.7% | same |
| In rain, sleet or snow | 2.8% | 10.7% | 13.8% | 74% below the state |
| Winter months (Nov–Mar) | 33.1% | 40.7% | 41.9% | 18% below the state |
| After dark | 14.9% | 24.7% | 24.8% | 40% below the state |
Washington County has lower values than Missouri for crashes per 100k residents / yr, on snow, slush or ice and in rain, sleet or snow. It stands out for higher deaths per 100 crashes and injuries per crash.
The headline for Washington County: 6.6 deaths per 100 truck crashes, vs 2.7 in Missouri.
Overview
Washington County has recorded 191 truck crashes since 2015, with 151 people injured and 12 killed.
That averages about one truck crash every 22 days in fully reported years.
When crashes happen
May has the most truck crashes, 15.2% of the yearly total, while January has the fewest (4.2%).
November through March accounts for 33.1% of truck crashes here, compared with 40.7% in Missouri.
The busiest hour is 11 am–12 pm, with 11.0% of truck crashes.
Snow, slush or ice was on the road in 1.7% of truck crashes, compared with 7.2% in Missouri.
Where crashes happen
The deadliest road for trucks in Washington County is SR-21, with 4 fatal large-truck crashes since 2015. It is followed by SR-8 (3) and SR-47 (2).
Garbage & waste trucks
Garbage and refuse trucks were involved in 5 crashes, 2.6% of the total, against 2.2% across Missouri.
Route planning tips for Washington County fleets
- Plan May schedules with more margin; it is the worst month for truck crashes in Washington County.
- Look at alternatives to SR-21 at busy times: it leads this area in fatal truck crashes.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
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 Washington County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Washington County) |
|---|---|
| SR-21 | 4 |
| SR-8 | 3 |
| SR-47 | 2 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Washington County) |
|---|---|
| Mo 21 | 52 |
| Mo 8 | 47 |
| Mo 185 | 17 |
| Mo 47 | 14 |
| Rt C | 6 |
| Rt A | 6 |
| Rt F | 4 |
| Rt P | 4 |
Washington County at a glance
| Population | 23,583 |
| Land area | 759.9 sq mi |
| Density | 31 per sq mi |
| Median household income (ZIP average) | $57,367 |
Waste facilities and haulers nearby
Historical data: truck crashes in Washington 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 | 14 | — | 0.9 |
| 2000s | 10 | -23% | 0.9 |
| 2010s | 12 | +16% | 0.5 |
| 2020s | 16 | +33% | 0.8 |
From the 1990s to the 2020s, yearly reported truck crashes went from 14 to 16. Some of the change may reflect how crashes were reported. Fatal large-truck crashes: 0.8 a year in 2016–19, 0.8 a year in 2020–24.
Cities, towns & communities in Washington County
ZIP codes in Washington County
Nearby counties
Questions fleets ask about Washington County
How many truck accidents are there in Washington County?
Washington County has had 191 reported truck crashes since 2015, injuring 151 people and killing 12.
Which road has the most fatal truck crashes in Washington County?
NHTSA data shows SR-21 with 4 fatal large-truck crashes in Washington County since 2015, the highest of any road.
Which month has the most truck crashes in Washington County?
Truck crashes in Washington County peak in May, with 15.2% of the year's crashes.
Are garbage truck crashes common in Washington County?
Since 2015, Washington County has reported 5 garbage-truck crashes, or 2.6% of its truck crashes.
What is the truck crash rate in Washington County compared with Missouri?
The yearly rate is 69.8 truck crashes per 100,000 residents in Washington County, vs 85.9 for Missouri.
What is the best way to plan truck routes in Washington County?
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.