ZIP 21791 (Union Bridge, MD) truck route planning & crash data
Plan safer truck routes around ZIP 21791: commercial truck and garbage truck crashes here and in Frederick 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
10.2 deaths per 100 garbage-truck crashes vs 2.8 for all trucks.
Deadliest roads
How Frederick County compares with Maryland
Frederick County against Maryland and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Frederick County stands out
Full comparison
| Measure (2015–2025) | Frederick County | Maryland | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 61.2 | 49.3 | 49.7 | 1.2× the state |
| Deaths per 100 crashes | 2.8 | 2.2 | 3.4 | 1.3× the state |
| Injuries per crash | 0.46 | 0.53 | 0.49 | 13% below the state |
| Garbage-truck share | 2.4% | 3.1% | 2.3% | 21% below the state |
| On snow, slush or ice | 2.7% | 2.4% | 6.2% | 1.1× the state |
| Morning rush (6–10 am) | 26.6% | 24.7% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 14.6% | 13.8% | 13.8% | same |
| Winter months (Nov–Mar) | 39.5% | 40.4% | 41.9% | same |
| After dark | 24.8% | 25.2% | 24.8% | same |
Frederick County has lower values than Maryland for injuries per crash and garbage-truck share. Where it is higher: crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
ZIP 21791 at a glance: SR-27 deadliest road: 4 fatal truck crashes within 10 miles of ZIP 21791 since 2015.
Overview
Frederick County has recorded 2,133 truck crashes since 2015, with 974 people injured and 60 killed.
Across the years with complete reporting, that is roughly one truck crash every 2 days.
When crashes happen
October has the most truck crashes, 9.6% of the yearly total, while February has the fewest (7.2%).
November through March accounts for 39.5% of truck crashes here, compared with 40.4% in Maryland.
The busiest hour is 8–9 am, with 7.7% of truck crashes.
Road surface: 2.7% of truck crashes were on snow, slush or ice (Maryland: 2.4%).
Where crashes happen
Within this area, SR-27 had the most fatal crashes involving a large truck since 2015 (4). Next come SR-26 (3), SR-194 (2) and SR-75 (2).
Garbage & waste trucks
Garbage trucks account for 50 of the truck crashes here, or 2.3%, compared with 3.1% in Maryland.
The most garbage-truck crashes happen in January (14%).
Deaths per 100 garbage-truck crashes: 10.2, vs 2.8 for all truck crashes.
Route planning tips for ZIP 21791 fleets
- Plan October schedules with more margin; it is the worst month for truck crashes in Frederick County.
- Check whether your routes use SR-27, the road with the most fatal truck crashes in this area.
- For residential and commercial waste routes, look again at January schedules: garbage-truck crashes peak then.
- 26.6% of truck crashes happen between 6 and 10 am, above Maryland; consider earlier or later starts where possible.
- With 2.7% of truck crashes on snow, slush or ice (above Maryland), plan winter equipment checks early.
- 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 Frederick County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-27 | 4 |
| SR-26 | 3 |
| SR-194 | 2 |
| SR-75 | 2 |
| CR-407 | 1 |
| SR-31 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Frederick County) |
|---|---|
| Eisenhower Memorial Hwy | 465 |
| Balto National Pike | 222 |
| Catoctin Mountain Hwy | 174 |
| Liberty Rd | 71 |
| Jefferson National Pike | 67 |
| Buckeystown Pike | 65 |
| Green Valley Rd | 59 |
| Frederick Freeway | 57 |
ZIP 21791 at a glance
| Population | 5,340 |
| Density | 45 per sq mi |
| Median household income | $93,015 |
| Median home value | $379,570 |
| Home ownership | 82% |
Waste facilities and haulers nearby
Historical data: truck crashes in Frederick 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 | 78 | — | 3.6 |
| 2000s | 92 | +17% | 3.5 |
| 2010s | 128 | +40% | 3.7 |
| 2020s | 199 | +55% | 5.2 |
From the 1990s to the 2020s, yearly reported truck crashes went from 78 to 199. Some of the change may reflect how crashes were reported. Fatal crashes involving a large truck averaged 4.5 a year in 2016–19 and 5.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 21791
How many truck accidents are there in ZIP 21791?
Since 2015, 2,133 crashes involving commercial trucks were reported in Frederick County (974 injured, 60 killed).
Which road has the most fatal truck crashes in ZIP 21791?
SR-27 had 4 fatal crashes involving a large truck within 10 miles of ZIP 21791 since 2015, more than any other road.
When do most truck crashes happen in ZIP 21791?
October has the most truck crashes in Frederick County, 9.6% of the yearly total.
How many garbage truck accidents happen in ZIP 21791?
Garbage trucks were involved in 50 reported crashes in Frederick County since 2015 (2.3% of truck crashes).
How does ZIP 21791 compare with Maryland for truck crashes?
Frederick County records 61.2 truck crashes per 100,000 residents a year, against 49.3 across Maryland.
How do I plan a garbage truck route in ZIP 21791?
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.