Mirrormont, WA truck route planning & crash data
Plan safer truck routes in Mirrormont: commercial truck and garbage truck crashes in Mirrormont 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 |
Compared with Washington, King County is lower on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. Where it is higher: garbage-truck share.
The headline for Mirrormont: SR-18 deadliest road: 5 fatal truck crashes within 10 miles of Mirrormont since 2015.
Overview
Since 2015, 6,019 crashes involving commercial trucks have been reported in King County. They injured 1,063 people and killed 156.
In complete reporting years that works out to about 1 truck crash a day.
Mirrormont had 0 reported truck crashes since 2015, too few for reliable patterns, so the charts and findings on this page use King County numbers.
When crashes happen
Truck crashes peak in October (9.3% of the year) and are lowest in May (7.4%).
Winter months (Nov–Mar) carry 41.5% of truck crashes, vs 43.8% for Washington.
The busiest hour is 12–1 pm, with 7.4% of truck crashes.
Road surface: 4.3% of truck crashes were on snow, slush or ice (Washington: 9.7%).
Where crashes happen
SR-18 leads within 10 miles of Mirrormont with 5 fatal crashes involving a large truck since 2015. It is followed by SR-169 (3), I-90 (2) and CR-SE May Valley Rd (1).
Garbage & waste trucks
180 crashes involved a garbage or refuse truck, a 3.0% share (Washington: 2.2%).
The most garbage-truck crashes happen in April (12%).
They recorded 0.6 deaths per 100 crashes, against 2.6 for all trucks.
Route planning tips for Mirrormont fleets
- Review driver schedules for October, the month with the most truck crashes.
- Look at alternatives to SR-18 at busy times: it leads this area in fatal truck crashes.
- Garbage-truck crashes here peak in April; review collection routes for that month.
- 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-18 | 5 |
| SR-169 | 3 |
| I-90 | 2 |
| CR-SE May Valley Rd | 1 |
| I-405 | 1 |
| Mu-Ne 3rd St | 1 |
| Olympic Ct Se | 1 |
| SR-202 | 1 |
| SR-203 | 1 |
| SR-900 | 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 |
Mirrormont at a glance
| Land area | 10.4 sq mi |
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 Mirrormont
How common are truck crashes in Mirrormont?
King County has had 6,019 reported truck crashes since 2015, injuring 1,063 people and killing 156.
Which road has the most fatal truck crashes in Mirrormont?
SR-18 had 5 fatal crashes involving a large truck within 10 miles of Mirrormont since 2015, more than any other road.
What is the worst month for truck crashes in Mirrormont?
The worst month is October: 9.3% of truck crashes in King County happen then.
Are garbage truck crashes common in Mirrormont?
180 crashes involving garbage or refuse trucks have been reported in King County since 2015, 3.0% of all truck crashes.
What is the truck crash rate in Mirrormont compared with Washington?
Per 100,000 residents, King County has 22.1 truck crashes a year; Washington has 25.8.
How can I plan a safer truck route in Mirrormont?
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.