Merrimack County, NH truck route planning & crash data
Plan safer truck routes in Merrimack County: 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
0.0 deaths per 100 garbage-truck crashes vs 3.0 for all trucks.
Deadliest roads
How Merrimack County compares with New Hampshire
Merrimack County against New Hampshire and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Merrimack County stands out
Full comparison
| Measure (2015–2025) | Merrimack County | New Hampshire | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 42.2 | 30.4 | 49.7 | 1.4× the state |
| Deaths per 100 crashes | 3.0 | 2.6 | 3.4 | 1.2× the state |
| Injuries per crash | 0.37 | 0.39 | 0.49 | same |
| Garbage-truck share | 2.9% | 4.2% | 2.3% | 31% below the state |
| On snow, slush or ice | 23.5% | 20.2% | 6.2% | 1.2× the state |
| Morning rush (6–10 am) | 29.8% | 29.3% | 23.7% | same |
| In rain, sleet or snow | 24.6% | 22.8% | 13.8% | 1.1× the state |
| Winter months (Nov–Mar) | 47.4% | 47.6% | 41.9% | same |
| After dark | 17.1% | 16.3% | 24.8% | same |
Merrimack County sits below New Hampshire on garbage-truck share. Where it is higher: crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
What stands out in Merrimack County: I-93 deadliest road: 4 fatal truck crashes in Merrimack County since 2015.
Overview
Police reported 761 crashes involving commercial trucks in Merrimack County since 2015: 277 people were injured and 22 were killed.
In complete reporting years that works out to about one truck crash every 5 days.
When crashes happen
Truck crashes peak in February (12.5% of the year) and are lowest in May (6.6%).
The five winter months (November to March) hold 47.4% of truck crashes, against 47.6% across New Hampshire.
The busiest hour is 10–11 am, with 8.5% of truck crashes.
Snow, slush or ice was on the road in 23.5% of truck crashes, compared with 20.2% in New Hampshire.
Where crashes happen
Within this area, I-93 had the most fatal crashes involving a large truck since 2015 (4). It is followed by I-89 (2), SR-3A (2) and SR-4 (2).
Garbage & waste trucks
Garbage and refuse trucks were involved in 21 crashes, 2.8% of the total, against 4.2% across New Hampshire.
The most garbage-truck crashes happen in July (24%).
Per 100 crashes, garbage trucks recorded 0.0 deaths compared with 3.0 for all trucks.
Route planning tips for Merrimack County fleets
- Build extra time into February routes: it has the most truck crashes here.
- Check whether your routes use I-93, the road with the most fatal truck crashes in this area.
- For residential and commercial waste routes, look again at July schedules: garbage-truck crashes peak then.
- Icy and snowy roads show up in 23.5% of truck crashes here, more than New Hampshire; schedule winter checks early.
- 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 Merrimack County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Merrimack County) |
|---|---|
| I-93 | 4 |
| I-89 | 2 |
| SR-3A | 2 |
| SR-4 | 2 |
| US-202 | 2 |
| Bridge Street | 1 |
| SR-106 | 1 |
| SR-11 | 1 |
| South Main Street | 1 |
| US-4 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Merrimack County) |
|---|---|
| SR-3A | 9 |
| Dover Rd | 9 |
| N/Everett Tpk | 5 |
| Manchester St | 4 |
| N & Exit 3 | 4 |
| Hooksett Rd | 3 |
| I 89 N Mm 28.6 | 3 |
| I 89 S Mm 21.8 2 Miles N Of Exit 9 | 3 |
Merrimack County at a glance
| Population | 157,869 |
| Land area | 932.9 sq mi |
| Density | 169 per sq mi |
| Median household income (ZIP average) | $99,334 |
Waste facilities and haulers nearby
Historical data: truck crashes in Merrimack 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 | 33 | — | 0.8 |
| 2000s | 49 | +46% | 1.8 |
| 2010s | 58 | +20% | 1.0 |
| 2020s | 64 | +9% | 1.6 |
From the 1990s to the 2020s, yearly reported truck crashes went from 33 to 64. Some of the change may reflect how crashes were reported. Fatal large-truck crashes: 1.8 a year in 2016–19, 1.6 a year in 2020–24.
Cities, towns & communities in Merrimack County
ZIP codes in Merrimack County
Nearby counties
Questions fleets ask about Merrimack County
How common are truck crashes in Merrimack County?
Merrimack County has had 761 reported truck crashes since 2015, injuring 277 people and killing 22.
What is the most dangerous road for trucks in Merrimack County?
NHTSA data shows I-93 with 4 fatal large-truck crashes in Merrimack County since 2015, the highest of any road.
What is the worst month for truck crashes in Merrimack County?
Truck crashes in Merrimack County peak in February, with 12.5% of the year's crashes.
Are garbage truck crashes common in Merrimack County?
21 crashes involving garbage or refuse trucks have been reported in Merrimack County since 2015, 2.8% of all truck crashes.
What is the truck crash rate in Merrimack County compared with New Hampshire?
The yearly rate is 42.2 truck crashes per 100,000 residents in Merrimack County, vs 30.4 for New Hampshire.
How do I plan a garbage truck route in Merrimack County?
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.