Larkfield-Wikiup, CA truck route planning & crash data
Plan safer truck routes in Larkfield-Wikiup: commercial truck and garbage truck crashes in Larkfield-Wikiup and Sonoma County, dangerous roads, seasonality and route safety data for fleets. Patterns use Sonoma County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
6.2 deaths per 100 garbage-truck crashes vs 3.0 for all trucks.
Deadliest roads
How Sonoma County compares with California
Sonoma County against California and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Sonoma County stands out
Full comparison
| Measure (2015–2025) | Sonoma County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 27.0 | 33.2 | 49.7 | 19% below the state |
| Deaths per 100 crashes | 3.0 | 3.6 | 3.4 | 17% below the state |
| Injuries per crash | 0.50 | 0.44 | 0.49 | 1.1× the state |
| Garbage-truck share | 3.3% | 1.6% | 2.3% | 2.0× the state |
| On snow, slush or ice | 0.4% | 0.9% | 6.2% | 62% below the state |
| Morning rush (6–10 am) | 28.5% | 23.5% | 23.7% | 1.2× the state |
| In rain, sleet or snow | 8.7% | 6.5% | 13.8% | 1.3× the state |
| Winter months (Nov–Mar) | 38.1% | 40.2% | 41.9% | same |
| After dark | 17.6% | 29.1% | 24.8% | 40% below the state |
Compared with California, Sonoma County is lower on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. It stands out for higher injuries per crash, garbage-truck share and morning rush (6–10 am).
What stands out in Sonoma County: 1 in 30 garbage-truck share of crashes is 3.3%, against 1.6% for California.
Overview
Since 2015, 1,502 crashes involving commercial trucks have been reported in Sonoma County. They injured 778 people and killed 43.
Across the years with complete reporting, that is roughly one truck crash every 3 days.
Larkfield-Wikiup had 0 reported truck crashes since 2015, too few for reliable patterns, so the charts and findings on this page use Sonoma County numbers.
When crashes happen
The worst month is October with 10.5% of truck crashes; the quietest is April at 7.4%.
Winter months (Nov–Mar) carry 38.1% of truck crashes, vs 40.2% for California.
The busiest hour is 8–9 am, with 8.8% of truck crashes.
Snow, slush or ice was on the road in 0.4% of truck crashes, compared with 0.9% in California.
Where crashes happen
Within this area, SR-12 had the most fatal crashes involving a large truck since 2015 (5). Next come River Rd (2), Todd Rd (2) and US-101 (2).
Garbage & waste trucks
Garbage trucks account for 50 of the truck crashes here, or 3.3%, compared with 1.6% in California.
Garbage-truck crashes peak in March (18% of them).
Deaths per 100 garbage-truck crashes: 6.2, vs 3.0 for all truck crashes.
Route planning tips for Larkfield-Wikiup fleets
- Review driver schedules for October, the month with the most truck crashes.
- Check whether your routes use SR-12, the road with the most fatal truck crashes in this area.
- For residential and commercial waste routes, look again at March schedules: garbage-truck crashes peak then.
- Morning starts matter: 28.5% of truck crashes fall between 6 and 10 am, higher than California.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
Sources: the FMCSA crash file for all reported truck crashes and NHTSA FARS for fatal crashes with a large truck. Every statement here comes straight from those numbers.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Sonoma County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-12 | 5 |
| River Rd | 2 |
| Todd Rd | 2 |
| US-101 | 2 |
| CR-RIVER Rd | 1 |
| Fulton Rd | 1 |
| Montecito Blvd | 1 |
| Occidental Rd | 1 |
| Petrified Forest Rd | 1 |
| River Road | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Sonoma County) |
|---|---|
| Us-101 S/B | 10 |
| US-101 | 8 |
| Lakeville Road | 5 |
| Us-101 N/B | 4 |
| SR-37 | 3 |
| SR-116 | 3 |
| Rt116/Green Valley Rd | 3 |
| Rt101/300Ft N Steele Ln | 3 |
Larkfield-Wikiup at a glance
| Land area | 5.3 sq mi |
| Median household income (ZIP 95403) | $98,191 |
| Median home value (ZIP 95403) | $681,784 |
Waste facilities and haulers nearby
Historical data: truck crashes in Sonoma 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 | 1 | — | 4.5 |
| 2000s | 72 | +7070% | 3.0 |
| 2010s | 122 | +69% | 3.1 |
| 2020s | 119 | -2% | 2.8 |
Reported truck crashes averaged 1 a year in the 1990s and 119 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 4.5 fatal large-truck crashes a year in 2016–19 and 2.8 a year in 2020–24.
Nearby places
Questions fleets ask about Larkfield-Wikiup
How common are truck crashes in Larkfield-Wikiup?
Since 2015, 1,502 crashes involving commercial trucks were reported in Sonoma County (778 injured, 43 killed).
Where do fatal truck crashes happen most in Larkfield-Wikiup?
NHTSA data shows SR-12 with 5 fatal large-truck crashes within 10 miles of Larkfield-Wikiup since 2015, the highest of any road.
What is the worst month for truck crashes in Larkfield-Wikiup?
Truck crashes in Sonoma County peak in October, with 10.5% of the year's crashes.
Are garbage truck crashes common in Larkfield-Wikiup?
Since 2015, Sonoma County has reported 50 garbage-truck crashes, or 3.3% of its truck crashes.
What is the truck crash rate in Larkfield-Wikiup compared with California?
The yearly rate is 27.0 truck crashes per 100,000 residents in Sonoma County, vs 33.2 for California.
What is the best way to plan truck routes in Larkfield-Wikiup?
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.