ZIP 95311 (Coulterville, CA) truck route planning & crash data
Plan safer truck routes around ZIP 95311: commercial truck and garbage truck crashes here and in Mariposa County, 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 55 truck crashes since 2015.
Deadliest roads
No fatal large-truck crashes with a road name recorded here since 2015.
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% of truck crashes happened on snow, slush or ice, vs 0.9% in California.
Overview
Police reported 55 crashes involving commercial trucks in Mariposa County since 2015: 29 people were injured and 3 were killed.
That averages about one truck crash every 80 days in fully reported years.
When crashes happen
July has the most truck crashes, 14.5% of the yearly total, while February has the fewest (0.0%).
The five winter months (November to March) hold 36.0% of truck crashes, against 40.2% across California.
By time of day, 9–10 am stands out with 18.2% of truck crashes.
Road surface: 6.0% of truck crashes were on snow, slush or ice (California: 0.9%).
Where crashes happen
No fatal crash involving a large truck has a recorded location within 10 miles of ZIP 95311 since 2015.
Garbage & waste trucks
3 crashes involved a garbage or refuse truck, a 5.5% share (California: 1.6%).
Route planning tips for ZIP 95311 fleets
- Build extra time into July routes: it has the most truck crashes here.
- The morning rush (6–10 am) holds 38.0% of truck crashes here, more than California; adjust start times where you can.
- 6.0% of truck crashes were on snow, slush or ice, above California; plan winter equipment checks before the season.
- 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 Mariposa County
By hour of day
Most dangerous roads for trucks
No fatal crashes involving a large truck with a road name were recorded within 10 miles since 2015.
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 |
ZIP 95311 at a glance
| Population | 2,245 |
| Density | 4 per sq mi |
| Median household income | $56,029 |
| Median home value | $310,938 |
| Home ownership | 85% |
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 |
Reported truck crashes averaged 5 a year in the 2000s and 5 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 0.8 fatal large-truck crashes a year in 2016–19 and 0.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 95311
How many truck crashes happen in ZIP 95311?
Since 2015, 55 crashes involving commercial trucks were reported in Mariposa County (29 injured, 3 killed).
When do most truck crashes happen in ZIP 95311?
Truck crashes in Mariposa County peak in July, with 14.5% of the year's crashes.
How many garbage truck accidents happen in ZIP 95311?
Garbage trucks were involved in 3 reported crashes in Mariposa County since 2015 (5.5% of truck crashes).
How do truck crashes in ZIP 95311 compare 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 ZIP 95311?
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.