Black Diamond, WA truck route planning & crash data
Plan safer truck routes in Black Diamond: commercial truck and garbage truck crashes in Black Diamond and King County, dangerous roads, seasonality and route safety data for fleets. Patterns use King County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
0.6 deaths per 100 garbage-truck crashes vs 2.6 for all trucks.
Deadliest roads
How King County compares with Washington
King County against Washington and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where King County stands out
Full comparison
| Measure (2015–2025) | King County | Washington | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 22.1 | 25.8 | 49.7 | 14% below the state |
| Deaths per 100 crashes | 2.6 | 3.4 | 3.4 | 24% below the state |
| Injuries per crash | 0.17 | 0.18 | 0.49 | same |
| Garbage-truck share | 2.9% | 2.2% | 2.3% | 1.3× the state |
| On snow, slush or ice | 4.3% | 9.7% | 6.2% | 56% below the state |
| Morning rush (6–10 am) | 24.8% | 24.8% | 23.7% | same |
| In rain, sleet or snow | 21.5% | 20.2% | 13.8% | same |
| Winter months (Nov–Mar) | 41.5% | 43.8% | 41.9% | same |
| After dark | 23.9% | 25.2% | 24.8% | same |
King County has lower values than Washington for crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. It runs above Washington on garbage-truck share.
The headline for Black Diamond: SR-169 most fatal truck crashes within 10 miles of Black Diamond: 3 since 2015.
Overview
Police reported 6,019 crashes involving commercial trucks in King County since 2015: 1,063 people were injured and 156 were killed.
In complete reporting years that works out to about 1 truck crash a day.
Only 9 truck crashes were reported in Black Diamond since 2015; patterns below come from King County as a whole.
When crashes happen
The worst month is October with 9.3% of truck crashes; the quietest is May at 7.4%.
The five winter months (November to March) hold 41.5% of truck crashes, against 43.8% across Washington.
More truck crashes happen at 12–1 pm than at any other hour (7.4%).
Road surface: 4.3% of truck crashes were on snow, slush or ice (Washington: 9.7%).
Where crashes happen
The deadliest road for trucks within 10 miles of Black Diamond is SR-169, with 3 fatal large-truck crashes since 2015. Next come 4th St Se (1), CR-AUBURN Black Diamond Rd (1) and CR-SE Auburn Black Diamond (1).
Garbage & waste trucks
Garbage trucks account for 180 of the truck crashes here, or 3.0%, compared with 2.2% in Washington.
Garbage-truck crashes peak in April (12% of them).
Per 100 crashes, garbage trucks recorded 0.6 deaths compared with 2.6 for all trucks.
Route planning tips for Black Diamond fleets
- Plan October schedules with more margin; it is the worst month for truck crashes in King County.
- Where you can, review stops along SR-169; it has the most fatal large-truck crashes nearby.
- Waste haulers: April is the peak month for garbage-truck crashes in King County.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
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 King County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-169 | 3 |
| 4th St Se | 1 |
| CR-AUBURN Black Diamond Rd | 1 |
| CR-SE Auburn Black Diamond | 1 |
| SR-018 | 1 |
| SR-164 | 1 |
| SR-18 | 1 |
| SR-516 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (King County) |
|---|---|
| Sr-167*026.00 | 24 |
| Sr-167*024.00 | 23 |
| Sr-167*014.00 | 22 |
| Sr-18*026.30 | 19 |
| Sr-167*019.00 | 18 |
| Sr-18*002.00 | 18 |
| Sr-18*001.00 | 17 |
| Sr-18*003.00 | 16 |
Black Diamond at a glance
| Population | 6,787 |
| Land area | 6.6 sq mi |
| Density | 1,029 per sq mi |
| Median household income (ZIP 98010) | $142,048 |
| Median home value (ZIP 98010) | $779,583 |
Waste facilities and haulers nearby
Historical data: truck crashes in King 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 | 330 | — | 10.3 |
| 2000s | 344 | +4% | 8.0 |
| 2010s | 451 | +31% | 7.2 |
| 2020s | 523 | +16% | 14.6 |
In the 1990s about 330 truck crashes a year were reported; in the 2020s, about 523. Reporting coverage also changed between these periods. Fatal large-truck crashes: 10.0 a year in 2016–19, 14.6 a year in 2020–24.
Nearby places
Questions fleets ask about Black Diamond
How many truck accidents are there in Black Diamond?
Since 2015, 6,019 crashes involving commercial trucks were reported in King County (1,063 injured, 156 killed).
What is the most dangerous road for trucks in Black Diamond?
NHTSA data shows SR-169 with 3 fatal large-truck crashes within 10 miles of Black Diamond since 2015, the highest of any road.
Which month has the most truck crashes in Black Diamond?
October has the most truck crashes in King County, 9.3% of the yearly total.
Are garbage truck crashes common in Black Diamond?
Garbage trucks were involved in 180 reported crashes in King County since 2015 (3.0% of truck crashes).
How does Black Diamond compare with Washington for truck crashes?
The yearly rate is 22.1 truck crashes per 100,000 residents in King County, vs 25.8 for Washington.
How do I plan a garbage truck route in Black Diamond?
Paste your stops into the free CurbWaste Route Planner: it scores your route against fatal-crash locations, suggests safer alternatives and flags low bridges.
2026 is a partial year. Updated October 2026.