Mariposa, CA truck route planning & crash data
Plan safer truck routes in Mariposa: commercial truck and garbage truck crashes in Mariposa and Mariposa County, dangerous roads, seasonality and route safety data for fleets. Patterns use Mariposa County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
3 of 55 truck crashes since 2015.
Deadliest roads
How Mariposa County compares with California
Mariposa County against California and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Mariposa County stands out
Full comparison
| Measure (2015–2025) | Mariposa County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 26.7 | 33.2 | 49.7 | 20% below the state |
| Deaths per 100 crashes | 6.0 | 3.6 | 3.4 | 1.7× the state |
| Injuries per crash | 0.50 | 0.44 | 0.49 | 1.1× the state |
| Garbage-truck share | 6.0% | 1.6% | 2.3% | 3.7× the state |
| On snow, slush or ice | 6.0% | 0.9% | 6.2% | 6.5× the state |
| Morning rush (6–10 am) | 38.0% | 23.5% | 23.7% | 1.6× the state |
| In rain, sleet or snow | 6.0% | 6.5% | 13.8% | 8% below the state |
| Winter months (Nov–Mar) | 36.0% | 40.2% | 41.9% | 11% below the state |
| After dark | 16.0% | 29.1% | 24.8% | 45% below the state |
Mariposa County has lower values than California for crashes per 100k residents / yr, in rain, sleet or snow and winter months (nov–mar). It runs above California on deaths per 100 crashes, injuries per crash and garbage-truck share.
Mariposa County at a glance: 6.0% share of truck crashes on snow, slush or ice (California: 0.9%).
Overview
Police reported 55 crashes involving commercial trucks in Mariposa County since 2015: 29 people were injured and 3 were killed.
Across the years with complete reporting, that is roughly one truck crash every 80 days.
With 0 truck crashes reported in Mariposa since 2015, this page uses Mariposa County numbers for its patterns and comparisons.
When crashes happen
Truck crashes peak in July (14.5% of the year) and are lowest in February (0.0%).
The five winter months (November to March) hold 36.0% of truck crashes, against 40.2% across California.
More truck crashes happen at 9–10 am than at any other hour (18.2%).
Road surface: 6.0% of truck crashes were on snow, slush or ice (California: 0.9%).
Where crashes happen
Fatal large-truck crashes within 10 miles of Mariposa since 2015 were spread across roads: SR-140 (1) and SR-49 (1).
Garbage & waste trucks
3 crashes involved a garbage or refuse truck, a 5.5% share (California: 1.6%).
Route planning tips for Mariposa fleets
- Plan July schedules with more margin; it is the worst month for truck crashes in Mariposa County.
- The morning rush (6–10 am) holds 38.0% of truck crashes here, more than California; adjust start times where you can.
- With 6.0% of truck crashes on snow, slush or ice (above California), plan winter equipment checks early.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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 Mariposa County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-140 | 1 |
| SR-49 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Mariposa County) |
|---|---|
| SR-140 | 3 |
| Rt49/255Ft S Of Stumpfield Mountain Rd | 2 |
| SR-49 | 2 |
| Bear Valley Rd/78Ft W Hunters Valley Rd | 1 |
| Greeley Hill Rd | 1 |
| Highway 140/450Ft W Martin Rd | 1 |
| Horseshoe Bend Rd/600Ft N Sr132 | 1 |
| Jerseydale Rd/.7M S Wild Dove Ln | 1 |
Mariposa at a glance
| Land area | 4.0 sq mi |
| Median household income (ZIP 95338) | $67,485 |
| Median home value (ZIP 95338) | $384,997 |
Waste facilities and haulers nearby
Historical data: truck crashes in Mariposa 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 | — | — | 0.2 |
| 2000s | 5 | — | 0.1 |
| 2010s | 3 | -34% | 0.5 |
| 2020s | 5 | +52% | 0.2 |
From the 2000s to the 2020s, yearly reported truck crashes went from 5 to 5. Some of the change may reflect how crashes were reported. Fatal large-truck crashes: 0.8 a year in 2016–19, 0.2 a year in 2020–24.
Nearby places
Questions fleets ask about Mariposa
How many truck accidents are there in Mariposa?
Since 2015, 55 crashes involving commercial trucks were reported in Mariposa County (29 injured, 3 killed).
When do most truck crashes happen in Mariposa?
The worst month is July: 14.5% of truck crashes in Mariposa County happen then.
How many garbage truck crashes are there in Mariposa?
Garbage trucks were involved in 3 reported crashes in Mariposa County since 2015 (5.5% of truck crashes).
What is the truck crash rate in Mariposa compared with California?
Mariposa County records 26.7 truck crashes per 100,000 residents a year, against 33.2 across California.
What is the best way to plan truck routes in Mariposa?
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.