ZIP 20684 (Saint Inigoes, MD) truck route planning & crash data
Plan safer truck routes around ZIP 20684: commercial truck and garbage truck crashes here and in St. Mary's 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
14 of 367 truck crashes since 2015.
Deadliest roads
No fatal large-truck crashes with a road name recorded here since 2015.
How St. Mary's County compares with Maryland
St. Mary's County against Maryland and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where St. Mary's County stands out
Full comparison
| Measure (2015–2025) | St. Mary's County | Maryland | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 27.1 | 49.3 | 49.7 | 45% below the state |
| Deaths per 100 crashes | 2.0 | 2.2 | 3.4 | 9% below the state |
| Injuries per crash | 0.67 | 0.53 | 0.49 | 1.3× the state |
| Garbage-truck share | 4.0% | 3.1% | 2.3% | 1.3× the state |
| On snow, slush or ice | 0.6% | 2.4% | 6.2% | 76% below the state |
| Morning rush (6–10 am) | 31.7% | 24.7% | 23.7% | 1.3× the state |
| In rain, sleet or snow | 9.5% | 13.8% | 13.8% | 31% below the state |
| Winter months (Nov–Mar) | 41.8% | 40.4% | 41.9% | same |
| After dark | 13.3% | 25.2% | 24.8% | 47% below the state |
Compared with Maryland, St. Mary's County is lower on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. It runs above Maryland on injuries per crash, garbage-truck share and morning rush (6–10 am).
The headline for St. Mary's County: 0.6% share of truck crashes on snow, slush or ice (Maryland: 2.4%).
Overview
Police reported 367 crashes involving commercial trucks in St. Mary's County since 2015: 243 people were injured and 8 were killed.
Across the years with complete reporting, that is roughly one truck crash every 12 days.
When crashes happen
Truck crashes peak in March (12.0% of the year) and are lowest in February (6.3%).
Winter months (Nov–Mar) carry 41.8% of truck crashes, vs 40.4% for Maryland.
By time of day, 12–1 pm stands out with 11.4% of truck crashes.
0.6% of truck crashes here happened on snow, slush or ice, against 2.4% across Maryland.
Where crashes happen
No fatal crash involving a large truck has a recorded location within 10 miles of ZIP 20684 since 2015.
Garbage & waste trucks
14 crashes involved a garbage or refuse truck, a 3.8% share (Maryland: 3.1%).
Route planning tips for ZIP 20684 fleets
- Build extra time into March routes: it has the most truck crashes here.
- The morning rush (6–10 am) holds 31.7% of truck crashes here, more than Maryland; adjust start times where you can.
- 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 St. Mary's 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 (St. Mary's County) |
|---|---|
| Three Notch Rd | 101 |
| Point Lookout Rd | 52 |
| Budds Creek Rd | 13 |
| St Andrews Church Rd | 12 |
| Acrs Marked Off Road | 8 |
| Great Mills Rd | 7 |
| Hollywood Rd | 6 |
| Patuxent Beach Rd | 5 |
ZIP 20684 at a glance
| Population | 802 |
| Density | 37 per sq mi |
| Median household income | $180,060 |
| Median home value | $360,286 |
| Home ownership | 93% |
Historical data: truck crashes in St. Mary's 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 | 14 | — | 1.1 |
| 2000s | 10 | -30% | 0.6 |
| 2010s | 24 | +158% | 0.8 |
| 2020s | 34 | +37% | 0.4 |
In the 1990s about 14 truck crashes a year were reported; in the 2020s, about 34. Reporting coverage also changed between these periods. Fatal crashes involving a large truck averaged 1.5 a year in 2016–19 and 0.4 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 20684
How common are truck crashes in ZIP 20684?
Since 2015, 367 crashes involving commercial trucks were reported in St. Mary's County (243 injured, 8 killed).
What is the worst month for truck crashes in ZIP 20684?
Truck crashes in St. Mary's County peak in March, with 12.0% of the year's crashes.
How many garbage truck crashes are there in ZIP 20684?
Since 2015, St. Mary's County has reported 14 garbage-truck crashes, or 3.8% of its truck crashes.
What is the truck crash rate in ZIP 20684 compared with Maryland?
Per 100,000 residents, St. Mary's County has 27.1 truck crashes a year; Maryland has 49.3.
What is the best way to plan truck routes in ZIP 20684?
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.