Colusa County, CA truck route planning & crash data
Plan safer truck routes in Colusa 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
3 of 393 truck crashes since 2015.
Deadliest roads
How Colusa County compares with California
Colusa County against California and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Colusa County stands out
Full comparison
| Measure (2015–2025) | Colusa County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 157.3 | 33.2 | 49.7 | 4.7× the state |
| Deaths per 100 crashes | 5.5 | 3.6 | 3.4 | 1.5× the state |
| Injuries per crash | 0.34 | 0.44 | 0.49 | 23% below the state |
| Garbage-truck share | 0.8% | 1.6% | 2.3% | 52% below the state |
| On snow, slush or ice | 0.0% | 0.9% | 6.2% | 100% below the state |
| Morning rush (6–10 am) | 23.0% | 23.5% | 23.7% | same |
| In rain, sleet or snow | 4.2% | 6.5% | 13.8% | 36% below the state |
| Winter months (Nov–Mar) | 31.9% | 40.2% | 41.9% | 21% below the state |
| After dark | 30.6% | 29.1% | 24.8% | same |
Compared with California, Colusa County is lower on injuries per crash, garbage-truck share and on snow, slush or ice. It stands out for higher crashes per 100k residents / yr and deaths per 100 crashes.
The headline for Colusa County: September the month with the most truck crashes: 16.0% of the year's total.
Overview
Police reported 393 crashes involving commercial trucks in Colusa County since 2015: 134 people were injured and 21 were killed.
Across the years with complete reporting, that is roughly one truck crash every 11 days.
When crashes happen
September has the most truck crashes, 16.0% of the yearly total, while January has the fewest (5.3%).
November through March accounts for 31.9% of truck crashes here, compared with 40.2% in California.
The busiest hour is 7–8 am, with 8.7% of truck crashes.
0.0% of truck crashes here happened on snow, slush or ice, against 0.9% across California.
Where crashes happen
Within this area, SR-20 had the most fatal crashes involving a large truck since 2015 (7). It is followed by I-5 (6), Butte Slough Rd (1) and CR-DANLEY Lateral Rd (1).
Garbage & waste trucks
3 crashes involved a garbage or refuse truck, a 0.8% share (California: 1.6%).
Route planning tips for Colusa County fleets
- Build extra time into September routes: it has the most truck crashes here.
- Check whether your routes use SR-20, the road with the most fatal truck crashes in this area.
- 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 Colusa County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Colusa County) |
|---|---|
| SR-20 | 7 |
| I-5 | 6 |
| Butte Slough Rd | 1 |
| CR-DANLEY Lateral Rd | 1 |
| CR-OLD Hwy 99W | 1 |
| Old Hwy 99W | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Colusa County) |
|---|---|
| Rt5/1000Ft N Greenbay Rd | 4 |
| SR-20 | 4 |
| Rt5 Nb/1.6M N Lurline Rd O/C | 3 |
| Rt 5/Rt 20 | 3 |
| Old Hwy 99W/1M N Hahn Rd | 3 |
| Lonestar Road | 2 |
| Old Hwy 99W/Myers Rd | 2 |
| Rt20/2.1M W Walnut Dr | 2 |
Colusa County at a glance
| Population | 22,074 |
| Land area | 1,150.7 sq mi |
| Density | 19 per sq mi |
| Median household income (ZIP average) | $80,138 |
Waste facilities and haulers nearby
Historical data: truck crashes in Colusa 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 | — | — | 0.8 |
| 2000s | 26 | — | 0.9 |
| 2010s | 29 | +11% | 1.4 |
| 2020s | 34 | +19% | 1.8 |
Reported truck crashes averaged 26 a year in the 2000s and 34 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. Fatal crashes involving a large truck averaged 1.8 a year in 2016–19 and 1.8 a year in 2020–24.
Cities, towns & communities in Colusa County
ZIP codes in Colusa County
Nearby counties
Questions fleets ask about Colusa County
How common are truck crashes in Colusa County?
Since 2015, 393 crashes involving commercial trucks were reported in Colusa County (134 injured, 21 killed).
What is the most dangerous road for trucks in Colusa County?
Since 2015, SR-20 has had the most fatal large-truck crashes in Colusa County: 7.
When do most truck crashes happen in Colusa County?
The worst month is September: 16.0% of truck crashes in Colusa County happen then.
How many garbage truck crashes are there in Colusa County?
Since 2015, Colusa County has reported 3 garbage-truck crashes, or 0.8% of its truck crashes.
How does Colusa County compare with California for truck crashes?
Per 100,000 residents, Colusa County has 157.3 truck crashes a year; California has 33.2.
What is the best way to plan truck routes in Colusa 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.