ZIP 94574 (Saint Helena, CA) truck route planning & crash data
Plan safer truck routes around ZIP 94574: commercial truck and garbage truck crashes here and in Napa 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 of 561 truck crashes since 2015.
Deadliest roads
How Napa County compares with California
Napa County against California and the US, 2015–2024 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Napa County stands out
Full comparison
| Measure (2015–2024) | Napa County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 39.2 | 33.2 | 49.7 | 1.2× the state |
| Deaths per 100 crashes | 3.5 | 3.6 | 3.4 | same |
| Injuries per crash | 0.50 | 0.44 | 0.49 | 1.1× the state |
| Garbage-truck share | 1.9% | 1.6% | 2.3% | 1.2× the state |
| On snow, slush or ice | 0.4% | 0.9% | 6.2% | 59% below the state |
| Morning rush (6–10 am) | 29.8% | 23.5% | 23.7% | 1.3× the state |
| In rain, sleet or snow | 7.5% | 6.5% | 13.8% | 1.2× the state |
| Winter months (Nov–Mar) | 38.3% | 40.2% | 41.9% | same |
| After dark | 12.3% | 29.1% | 24.8% | 58% below the state |
Napa County sits below California on on snow, slush or ice and after dark. It runs above California on crashes per 100k residents / yr, injuries per crash and garbage-truck share.
The headline for ZIP 94574: SR-29 most fatal truck crashes within 10 miles of ZIP 94574: 2 since 2015.
Overview
Police reported 561 crashes involving commercial trucks in Napa County since 2015: 276 people were injured and 19 were killed.
In complete reporting years that works out to about one truck crash every 7 days.
When crashes happen
October has the most truck crashes, 10.9% of the yearly total, while January has the fewest (6.2%).
Winter months (Nov–Mar) carry 38.3% of truck crashes, vs 40.2% for California.
The busiest hour is 11 am–12 pm, with 8.9% of truck crashes.
0.4% of truck crashes here happened on snow, slush or ice, against 0.9% across California.
Where crashes happen
Within this area, SR-29 had the most fatal crashes involving a large truck since 2015 (2). It is followed by Oakville Grade Rd (1), SR-128 (1) and Silverado Trl (1).
Garbage & waste trucks
10 crashes involved a garbage or refuse truck, a 1.8% share (California: 1.6%).
Route planning tips for ZIP 94574 fleets
- Build extra time into October routes: it has the most truck crashes here.
- Look at alternatives to SR-29 at busy times: it leads this area in fatal truck crashes.
- 29.8% of truck crashes happen between 6 and 10 am, above California; consider earlier or later starts where possible.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
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.
Reporting to FMCSA was incomplete in 2025; rates and comparisons skip those years.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Napa County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-29 | 2 |
| Oakville Grade Rd | 1 |
| SR-128 | 1 |
| Silverado Trl | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Napa County) |
|---|---|
| SR-29 | 12 |
| Rt128/Petrified Forest Rd | 5 |
| Rt29/Deer Park Rd | 3 |
| Rt12/Rt29 | 3 |
| Big Ranch Rd/662Ft N Salvador Av | 2 |
| Broadway/Eucalyptus Dr | 2 |
| Broadway/Green Island Rd | 2 |
| Broadway/Paoli Loop Rd | 2 |
ZIP 94574 at a glance
| Population | 7,457 |
| Density | 23 per sq mi |
| Median household income | $139,474 |
| Median home value | $1,565,216 |
| Home ownership | 66% |
Waste facilities and haulers nearby
Historical data: truck crashes in Napa 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 | — | — | 1.7 |
| 2000s | 32 | — | 1.2 |
| 2010s | 45 | +41% | 1.3 |
| 2020s | 52 | +16% | 1.8 |
From the 2000s to the 2020s, yearly reported truck crashes went from 32 to 52. Some of the change may reflect how crashes were reported. NHTSA counts 1.5 fatal large-truck crashes a year in 2016–19 and 1.8 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 94574
How many truck accidents are there in ZIP 94574?
Since 2015, 561 crashes involving commercial trucks were reported in Napa County (276 injured, 19 killed).
Which road has the most fatal truck crashes in ZIP 94574?
NHTSA data shows SR-29 with 2 fatal large-truck crashes within 10 miles of ZIP 94574 since 2015, the highest of any road.
What is the worst month for truck crashes in ZIP 94574?
The worst month is October: 10.9% of truck crashes in Napa County happen then.
How many garbage truck accidents happen in ZIP 94574?
Since 2015, Napa County has reported 10 garbage-truck crashes, or 1.8% of its truck crashes.
What is the truck crash rate in ZIP 94574 compared with California?
Per 100,000 residents, Napa County has 39.2 truck crashes a year; California has 33.2.
How can I plan a safer truck route in ZIP 94574?
The free Route Planner takes your stops and returns a route risk score, safer alternatives and low-bridge warnings.
Crash reporting to FMCSA was incomplete in 2025; those years are greyed out and left out of rates. 2026 is a partial year. Updated October 2026.