St. Mary Parish, LA truck route planning & crash data
Plan safer truck routes in St. Mary Parish: 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
4 of 316 truck crashes since 2015.
Deadliest roads
How St. Mary Parish compares with Louisiana
St. Mary Parish against Louisiana and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where St. Mary Parish stands out
Full comparison
| Measure (2015–2025) | St. Mary Parish | Louisiana | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 61.1 | 81.5 | 49.7 | 25% below the state |
| Deaths per 100 crashes | 4.5 | 3.0 | 3.4 | 1.5× the state |
| Injuries per crash | 0.90 | 0.77 | 0.49 | 1.2× the state |
| Garbage-truck share | 1.1% | 2.2% | 2.3% | 52% below the state |
| On snow, slush or ice | 1.1% | 0.8% | 6.2% | 1.4× the state |
| Morning rush (6–10 am) | 25.9% | 23.6% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 10.5% | 10.5% | 13.8% | same |
| Winter months (Nov–Mar) | 37.4% | 40.3% | 41.9% | 7% below the state |
| After dark | 18.2% | 23.9% | 24.8% | 24% below the state |
St. Mary Parish sits below Louisiana on crashes per 100k residents / yr, garbage-truck share and winter months (nov–mar). It stands out for higher deaths per 100 crashes, injuries per crash and on snow, slush or ice.
The headline for St. Mary Parish: 1 in 95 garbage-truck share of crashes is 1.1%, against 2.2% for Louisiana.
Overview
Since 2015, 316 crashes involving commercial trucks have been reported in St. Mary Parish. They injured 282 people and killed 14.
In complete reporting years that works out to about one truck crash every 13 days.
When crashes happen
The worst month is September with 12.7% of truck crashes; the quietest is December at 4.4%.
November through March accounts for 37.4% of truck crashes here, compared with 40.3% in Louisiana.
The busiest hour is 9–10 am, with 8.2% of truck crashes.
Snow, slush or ice was on the road in 1.1% of truck crashes, compared with 0.8% in Louisiana.
Where crashes happen
The deadliest road for trucks in St. Mary Parish is US-90, with 6 fatal large-truck crashes since 2015. Next come E Hwy 90 Frontage Rd (1), SR-182 (1) and SR-322 (1).
Garbage & waste trucks
Garbage trucks account for 4 of the truck crashes here, or 1.3%, compared with 2.2% in Louisiana.
Route planning tips for St. Mary Parish fleets
- Build extra time into September routes: it has the most truck crashes here.
- Look at alternatives to US-90 at busy times: it leads this area in fatal truck crashes.
- 25.9% of truck crashes happen between 6 and 10 am, above Louisiana; consider earlier or later starts where possible.
- Icy and snowy roads show up in 1.1% of truck crashes here, more than Louisiana; schedule winter checks early.
- 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.
Reporting to FMCSA was incomplete in 2023; rates and comparisons skip those years.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in St. Mary Parish
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in St. Mary Parish) |
|---|---|
| US-90 | 6 |
| E Hwy 90 Frontage Rd | 1 |
| SR-182 | 1 |
| SR-322 | 1 |
| US-190 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (St. Mary Parish) |
|---|---|
| US-90 | 198 |
| La-182 | 33 |
| La-70 | 13 |
| La-317 | 9 |
| La-3211 | 5 |
| La-83 | 4 |
| Victor Ii | 3 |
| La-87 | 3 |
St. Mary Parish at a glance
| Population | 46,799 |
| Land area | 558.5 sq mi |
| Density | 84 per sq mi |
| Median household income (ZIP average) | $53,217 |
Waste facilities and haulers nearby
Historical data: truck crashes in St. Mary Parish 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 | 18 | — | 2.0 |
| 2000s | 36 | +103% | 1.3 |
| 2010s | 37 | +3% | 1.1 |
| 2020s | 26 | -28% | 1.0 |
From the 1990s to the 2020s, yearly reported truck crashes went from 18 to 26. Some of the change may reflect how crashes were reported. Fatal crashes involving a large truck averaged 1.0 a year in 2016–19 and 1.0 a year in 2020–24.
Cities, towns & communities in St. Mary Parish
ZIP codes in St. Mary Parish
Nearby counties
Questions fleets ask about St. Mary Parish
How common are truck crashes in St. Mary Parish?
Since 2015, 316 crashes involving commercial trucks were reported in St. Mary Parish (282 injured, 14 killed).
Which road has the most fatal truck crashes in St. Mary Parish?
NHTSA data shows US-90 with 6 fatal large-truck crashes in St. Mary Parish since 2015, the highest of any road.
What is the worst month for truck crashes in St. Mary Parish?
September has the most truck crashes in St. Mary Parish, 12.7% of the yearly total.
How many garbage truck crashes are there in St. Mary Parish?
Garbage trucks were involved in 4 reported crashes in St. Mary Parish since 2015 (1.3% of truck crashes).
How does St. Mary Parish compare with Louisiana for truck crashes?
St. Mary Parish records 61.1 truck crashes per 100,000 residents a year, against 81.5 across Louisiana.
How do I plan a garbage truck route in St. Mary Parish?
Use the free Route Planner: enter your stops to get a risk score, safer alternatives and the low bridges on your route.
Crash reporting to FMCSA was incomplete in 2023; those years are greyed out and left out of rates. 2026 is a partial year. Updated October 2026.