ZIP 59623 (Helena, MT) truck route planning & crash data
Plan safer truck routes around ZIP 59623: commercial truck and garbage truck crashes here and in Lewis and Clark 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
2 of 228 truck crashes since 2015.
Deadliest roads
How Lewis and Clark County compares with Montana
Lewis and Clark County against Montana and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Lewis and Clark County stands out
Full comparison
| Measure (2015–2025) | Lewis and Clark County | Montana | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 24.9 | 64.3 | 49.7 | 61% below the state |
| Deaths per 100 crashes | 5.3 | 3.8 | 3.4 | 1.4× the state |
| Injuries per crash | 0.29 | 0.34 | 0.49 | 15% below the state |
| Garbage-truck share | 1.0% | 0.9% | 2.3% | same |
| On snow, slush or ice | 34.5% | 39.4% | 6.2% | 12% below the state |
| Morning rush (6–10 am) | 20.9% | 22.9% | 23.7% | 9% below the state |
| In rain, sleet or snow | 24.3% | 20.6% | 13.8% | 1.2× the state |
| Winter months (Nov–Mar) | 45.6% | 54.3% | 41.9% | 16% below the state |
| After dark | 20.9% | 30.8% | 24.8% | 32% below the state |
Lewis and Clark County sits below Montana on crashes per 100k residents / yr, injuries per crash and on snow, slush or ice. It runs above Montana on deaths per 100 crashes and in rain, sleet or snow.
ZIP 59623 at a glance: US-12 3 fatal truck crashes since 2015, more than any other road within 10 miles of ZIP 59623.
Overview
Lewis and Clark County has recorded 228 truck crashes since 2015, with 69 people injured and 12 killed.
That averages about one truck crash every 19 days in fully reported years.
When crashes happen
The worst month is October with 13.2% of truck crashes; the quietest is May at 3.9%.
November through March accounts for 45.6% of truck crashes here, compared with 54.3% in Montana.
By time of day, 1–2 pm stands out with 9.6% of truck crashes.
Snow, slush or ice was on the road in 34.5% of truck crashes, compared with 39.4% in Montana.
Where crashes happen
US-12 leads within 10 miles of ZIP 59623 with 3 fatal crashes involving a large truck since 2015. After it: Canyon Ferry Rd (1), I-15 (1) and N Rodney St (1).
Garbage & waste trucks
2 crashes involved a garbage or refuse truck, a 0.9% share (Montana: 0.9%).
Route planning tips for ZIP 59623 fleets
- Plan October schedules with more margin; it is the worst month for truck crashes in Lewis and Clark County.
- Look at alternatives to US-12 at busy times: it leads this area in fatal truck crashes.
- 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 Lewis and Clark County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-12 | 3 |
| Canyon Ferry Rd | 1 |
| I-15 | 1 |
| N Rodney St | 1 |
| Sr-Green Meadow Dr | 1 |
| Ssr-453 Lincoln Rd | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Lewis and Clark County) |
|---|---|
| Mm 221.5 I-15 | 4 |
| Mm 213.0 I-15 | 3 |
| Mm221.6 I-15 | 2 |
| Canyon Ferry Rd\Custer Ave | 1 |
| E Us Highway 12 And Lola St | 1 |
| Mm 108.2 Mt Highway 200 | 1 |
| Mm 213.1 I-15 | 1 |
| Mm 213.1 I15 | 1 |
ZIP 59623 at a glance
| Population | 0 |
| Density | 0 per sq mi |
Waste facilities and haulers nearby
Historical data: truck crashes in Lewis and Clark 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 | — | — | 0.5 |
| 2000s | 18 | — | 0.5 |
| 2010s | 18 | +1% | 0.5 |
| 2020s | 18 | +0% | 1.2 |
Reported truck crashes averaged 18 a year in the 2000s and 18 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 0.8 fatal large-truck crashes a year in 2016–19 and 1.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 59623
How common are truck crashes in ZIP 59623?
Lewis and Clark County has had 228 reported truck crashes since 2015, injuring 69 people and killing 12.
Which road has the most fatal truck crashes in ZIP 59623?
NHTSA data shows US-12 with 3 fatal large-truck crashes within 10 miles of ZIP 59623 since 2015, the highest of any road.
When do most truck crashes happen in ZIP 59623?
The worst month is October: 13.2% of truck crashes in Lewis and Clark County happen then.
How many garbage truck crashes are there in ZIP 59623?
Since 2015, Lewis and Clark County has reported 2 garbage-truck crashes, or 0.9% of its truck crashes.
How do truck crashes in ZIP 59623 compare with Montana?
Per 100,000 residents, Lewis and Clark County has 24.9 truck crashes a year; Montana has 64.3.
How do I plan a garbage truck route in ZIP 59623?
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.