Longmont, CO truck route planning & crash data
Plan safer truck routes in Longmont: commercial truck and garbage truck crashes in Longmont and Boulder County, dangerous roads, seasonality and route safety data for fleets. Patterns use Boulder County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
4.5 deaths per 100 garbage-truck crashes vs 4.5 for all trucks.
Deadliest roads
How Boulder County compares with Colorado
Boulder County against Colorado and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Boulder County stands out
Full comparison
| Measure (2015–2025) | Boulder County | Colorado | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 14.6 | 32.6 | 49.7 | 55% below the state |
| Deaths per 100 crashes | 4.5 | 5.1 | 3.4 | 12% below the state |
| Injuries per crash | 0.36 | 0.32 | 0.49 | 1.1× the state |
| Garbage-truck share | 4.1% | 2.8% | 2.3% | 1.5× the state |
| On snow, slush or ice | 10.2% | 14.8% | 6.2% | 31% below the state |
| Morning rush (6–10 am) | 29.0% | 25.7% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 10.0% | 13.2% | 13.8% | 24% below the state |
| Winter months (Nov–Mar) | 42.9% | 43.5% | 41.9% | same |
| After dark | 10.0% | 22.4% | 24.8% | 55% below the state |
Boulder County sits below Colorado on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. It stands out for higher injuries per crash, garbage-truck share and morning rush (6–10 am).
The headline for Longmont: I-25 most fatal truck crashes within 10 miles of Longmont: 7 since 2015.
Overview
Boulder County has recorded 563 truck crashes since 2015, with 212 people injured and 24 killed.
That averages about one truck crash every 8 days in fully reported years.
Only 125 truck crashes were reported in Longmont since 2015; patterns below come from Boulder County as a whole.
36% of truck crash reports in Boulder County since 2015 leave the city field blank; place counts include only reports that name the place.
When crashes happen
The worst month is June with 10.8% of truck crashes; the quietest is April at 5.9%.
November through March accounts for 42.9% of truck crashes here, compared with 43.5% in Colorado.
The busiest hour is 1–2 pm, with 11.0% of truck crashes.
Snow, slush or ice was on the road in 10.2% of truck crashes, compared with 14.8% in Colorado.
Where crashes happen
The deadliest road for trucks within 10 miles of Longmont is I-25, with 7 fatal large-truck crashes since 2015. After it: SR-119 (5), SR-66 (3) and US-287 (3).
Garbage & waste trucks
Garbage and refuse trucks were involved in 24 crashes, 4.3% of the total, against 2.8% across Colorado.
The most garbage-truck crashes happen in August (17%).
Deaths per 100 garbage-truck crashes: 4.5, vs 4.5 for all truck crashes.
Route planning tips for Longmont fleets
- Build extra time into June routes: it has the most truck crashes here.
- Where you can, review stops along I-25; it has the most fatal large-truck crashes nearby.
- For residential and commercial waste routes, look again at August schedules: garbage-truck crashes peak then.
- The morning rush (6–10 am) holds 29.0% of truck crashes here, more than Colorado; adjust start times where you can.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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 Boulder County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| I-25 | 7 |
| SR-119 | 5 |
| SR-66 | 3 |
| US-287 | 3 |
| Hover St | 2 |
| SR-52 | 2 |
| Aggregate Blvd | 1 |
| Boston Ave | 1 |
| CR-13 | 1 |
| CR-NELSON Rd | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Boulder County) |
|---|---|
| Hwy 287 At Mp 306 | 4 |
| Hwy 66 At Mp 37 | 4 |
| Ken Pratt Blvd At Bowen St | 3 |
| Hwy 66 At Mp 38 | 3 |
| Hwy 52 At Mp 6 | 3 |
| Hwy 36 At Mp 44 | 3 |
| Hwy 36 At Mp 42 | 3 |
| Hwy 36 At Mp 40 | 3 |
Longmont at a glance
| Population | 99,818 |
| Land area | 29.3 sq mi |
| Density | 3,411 per sq mi |
| Median household income (ZIP 80501) | $80,911 |
| Median home value (ZIP 80501) | $485,766 |
Waste facilities and haulers nearby
Historical data: truck crashes in Boulder 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 | 34 | — | 1.4 |
| 2000s | 46 | +36% | 1.9 |
| 2010s | 50 | +8% | 2.6 |
| 2020s | 44 | -13% | 1.4 |
In the 1990s about 34 truck crashes a year were reported; in the 2020s, about 44. Reporting coverage also changed between these periods. Fatal large-truck crashes: 4.2 a year in 2016–19, 1.4 a year in 2020–24.
Nearby places
Questions fleets ask about Longmont
How many truck crashes happen in Longmont?
Boulder County has had 563 reported truck crashes since 2015, injuring 212 people and killing 24.
Where do fatal truck crashes happen most in Longmont?
Since 2015, I-25 has had the most fatal large-truck crashes within 10 miles of Longmont: 7.
When do most truck crashes happen in Longmont?
June has the most truck crashes in Boulder County, 10.8% of the yearly total.
How many garbage truck accidents happen in Longmont?
24 crashes involving garbage or refuse trucks have been reported in Boulder County since 2015, 4.3% of all truck crashes.
How does Longmont compare with Colorado for truck crashes?
Per 100,000 residents, Boulder County has 14.6 truck crashes a year; Colorado has 32.6.
How do I plan a garbage truck route in Longmont?
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.