ZIP 20690 (Tall Timbers, MD) truck route planning & crash data
Plan safer truck routes around ZIP 20690: 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
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 |
St. Mary's County has lower values than Maryland for 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% on snowy, slushy or icy roads, against 2.4% across Maryland.
Overview
Since 2015, 367 crashes involving commercial trucks have been reported in St. Mary's County. They injured 243 people and killed 8.
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%).
November through March accounts for 41.8% of truck crashes here, compared with 40.4% in Maryland.
More truck crashes happen at 12–1 pm than at any other hour (11.4%).
Snow, slush or ice was on the road in 0.6% of truck crashes, compared with 2.4% in Maryland.
Where crashes happen
Fatal large-truck crashes within 10 miles of ZIP 20690 since 2015 were spread across roads: CR-604 (1).
Garbage & waste trucks
14 crashes involved a garbage or refuse truck, a 3.8% share (Maryland: 3.1%).
Route planning tips for ZIP 20690 fleets
- Plan March schedules with more margin; it is the worst month for truck crashes in St. Mary's County.
- Morning starts matter: 31.7% of truck crashes fall between 6 and 10 am, higher than Maryland.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
Sources: the FMCSA crash file for all reported truck crashes and NHTSA FARS for fatal crashes with a large truck. Every statement here comes straight from those numbers.
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
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| CR-604 | 1 |
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 20690 at a glance
| Population | 1,077 |
| Density | 249 per sq mi |
| Median household income | $122,750 |
| Home ownership | 75% |
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 |
From the 1990s to the 2020s, yearly reported truck crashes went from 14 to 34. Some of the change may reflect how crashes were reported. 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 20690
How common are truck crashes in ZIP 20690?
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 20690?
The worst month is March: 12.0% of truck crashes in St. Mary's County happen then.
Are garbage truck crashes common in ZIP 20690?
14 crashes involving garbage or refuse trucks have been reported in St. Mary's County since 2015, 3.8% of all truck crashes.
How do truck crashes in ZIP 20690 compare with Maryland?
St. Mary's County records 27.1 truck crashes per 100,000 residents a year, against 49.3 across Maryland.
What is the best way to plan truck routes in ZIP 20690?
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.