Plymouth, NH truck route planning & crash data
Plan safer truck routes in Plymouth: commercial truck and garbage truck crashes in Plymouth and Grafton County, dangerous roads, seasonality and route safety data for fleets. Patterns use Grafton County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
14 of 297 truck crashes since 2015.
Deadliest roads
How Grafton County compares with New Hampshire
Grafton County against New Hampshire and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Grafton County stands out
Full comparison
| Measure (2015–2025) | Grafton County | New Hampshire | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 28.1 | 30.4 | 49.7 | 8% below the state |
| Deaths per 100 crashes | 2.8 | 2.6 | 3.4 | 1.1× the state |
| Injuries per crash | 0.47 | 0.39 | 0.49 | 1.2× the state |
| Garbage-truck share | 4.9% | 4.2% | 2.3% | 1.2× the state |
| On snow, slush or ice | 31.9% | 20.2% | 6.2% | 1.6× the state |
| Morning rush (6–10 am) | 27.8% | 29.3% | 23.7% | same |
| In rain, sleet or snow | 31.2% | 22.8% | 13.8% | 1.4× the state |
| Winter months (Nov–Mar) | 51.7% | 47.6% | 41.9% | 1.1× the state |
| After dark | 18.4% | 16.3% | 24.8% | 1.1× the state |
Compared with New Hampshire, Grafton County is lower on crashes per 100k residents / yr. It stands out for higher deaths per 100 crashes, injuries per crash and garbage-truck share.
The headline for Grafton County: 31.9% on snowy, slushy or icy roads, against 20.2% across New Hampshire.
Overview
Since 2015, 297 crashes involving commercial trucks have been reported in Grafton County. They injured 138 people and killed 8.
In complete reporting years that works out to about one truck crash every 14 days.
Plymouth had 12 reported truck crashes since 2015, too few for reliable patterns, so the charts and findings on this page use Grafton County numbers.
When crashes happen
Truck crashes peak in December (13.1% of the year) and are lowest in March (4.7%).
Winter months (Nov–Mar) carry 51.7% of truck crashes, vs 47.6% for New Hampshire.
The busiest hour is 1–2 pm, with 9.8% of truck crashes.
Road surface: 31.9% of truck crashes were on snow, slush or ice (New Hampshire: 20.2%).
Where crashes happen
Since 2015, fatal crashes with a large truck within 10 miles of Plymouth happened on SR-25 (1); no road leads clearly.
Garbage & waste trucks
Garbage trucks account for 14 of the truck crashes here, or 4.7%, compared with 4.2% in New Hampshire.
Route planning tips for Plymouth fleets
- Build extra time into December routes: it has the most truck crashes here.
- Icy and snowy roads show up in 31.9% of truck crashes here, more than New Hampshire; schedule winter checks early.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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 Grafton County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-25 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Grafton County) |
|---|---|
| Main St | 7 |
| I-93 | 6 |
| SR-3 | 4 |
| SR-302 | 3 |
| Dartmouth College Hwy | 2 |
| I 93 80 Ft N Of Mm 80.8 | 2 |
| I 93 Mm 106.4 | 2 |
| I-89 | 2 |
Plymouth at a glance
| Population | 6,621 |
| Land area | 5.9 sq mi |
| Density | 1,127 per sq mi |
| Median household income (ZIP 03264) | $76,892 |
| Median home value (ZIP 03264) | $287,244 |
Waste facilities and haulers nearby
Historical data: truck crashes in Grafton 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 | 20 | — | 1.1 |
| 2000s | 24 | +23% | 0.6 |
| 2010s | 28 | +16% | 0.8 |
| 2020s | 22 | -23% | 0.6 |
Reported truck crashes averaged 20 a year in the 1990s and 22 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. Fatal large-truck crashes: 1.2 a year in 2016–19, 0.6 a year in 2020–24.
Nearby places
Questions fleets ask about Plymouth
How many truck accidents are there in Plymouth?
Since 2015, 297 crashes involving commercial trucks were reported in Grafton County (138 injured, 8 killed).
What is the worst month for truck crashes in Plymouth?
The worst month is December: 13.1% of truck crashes in Grafton County happen then.
How many garbage truck accidents happen in Plymouth?
14 crashes involving garbage or refuse trucks have been reported in Grafton County since 2015, 4.7% of all truck crashes.
How does Plymouth compare with New Hampshire for truck crashes?
Grafton County records 28.1 truck crashes per 100,000 residents a year, against 30.4 across New Hampshire.
How can I plan a safer truck route in Plymouth?
Paste your stops into the free CurbWaste Route Planner: it scores your route against fatal-crash locations, suggests safer alternatives and flags low bridges.
2026 is a partial year. Updated October 2026.