ZIP 94021 (Loma Mar, CA) truck route planning & crash data
Plan safer truck routes around ZIP 94021: commercial truck and garbage truck crashes here and in San Mateo 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
7.5 deaths per 100 garbage-truck crashes vs 2.7 for all trucks.
Deadliest roads
How San Mateo County compares with California
San Mateo County against California and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where San Mateo County stands out
Full comparison
| Measure (2015–2025) | San Mateo County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 15.7 | 33.2 | 49.7 | 53% below the state |
| Deaths per 100 crashes | 2.7 | 3.6 | 3.4 | 25% below the state |
| Injuries per crash | 0.47 | 0.44 | 0.49 | same |
| Garbage-truck share | 3.1% | 1.6% | 2.3% | 1.9× the state |
| On snow, slush or ice | 0.0% | 0.9% | 6.2% | 100% below the state |
| Morning rush (6–10 am) | 28.0% | 23.5% | 23.7% | 1.2× the state |
| In rain, sleet or snow | 6.6% | 6.5% | 13.8% | same |
| Winter months (Nov–Mar) | 39.0% | 40.2% | 41.9% | same |
| After dark | 22.3% | 29.1% | 24.8% | 23% below the state |
San Mateo County sits below California on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. It runs above California on garbage-truck share and morning rush (6–10 am).
San Mateo County at a glance: 1 in 32 of truck crashes here involve garbage trucks: 3.1%, vs 1.6% in California.
Overview
San Mateo County has recorded 1,319 truck crashes since 2015, with 630 people injured and 36 killed.
Across the years with complete reporting, that is roughly one truck crash every 3 days.
When crashes happen
The worst month is June with 10.8% of truck crashes; the quietest is May at 6.7%.
November through March accounts for 39.0% of truck crashes here, compared with 40.2% in California.
By time of day, 8–9 am stands out with 8.4% of truck crashes.
0.0% of truck crashes here happened on snow, slush or ice, against 0.9% across California.
Where crashes happen
Within this area, SR-1 had the most fatal crashes involving a large truck since 2015 (3). It is followed by Black Mountain Rd (1) and SR-84 (1).
Garbage & waste trucks
40 crashes involved a garbage or refuse truck, a 3.0% share (California: 1.6%).
Their busiest month is September, with 18% of garbage-truck crashes.
Per 100 crashes, garbage trucks recorded 7.5 deaths compared with 2.7 for all trucks.
Route planning tips for ZIP 94021 fleets
- Review driver schedules for June, the month with the most truck crashes.
- Where you can, review stops along SR-1; it has the most fatal large-truck crashes nearby.
- For residential and commercial waste routes, look again at September schedules: garbage-truck crashes peak then.
- Morning starts matter: 28.0% of truck crashes fall between 6 and 10 am, higher than California.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
About the data
Crash counts come from the FMCSA crash file (police-reported crashes involving trucks over 10,000 lb); fatal-crash locations come from NHTSA FARS. Text on this page states only what these numbers show.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in San Mateo County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-1 | 3 |
| Black Mountain Rd | 1 |
| SR-84 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (San Mateo County) |
|---|---|
| Us-101 N/B | 15 |
| Us-101 S/B | 9 |
| Rt92/.3M E Rt35 | 4 |
| Rt92/3.6M E Foster City Bl | 4 |
| Sr-92 E/B | 4 |
| Woodside Rd/Broadway | 3 |
| SR-1 | 3 |
| Rt92/100Ft W Pilarcitos Creek Rd | 3 |
ZIP 94021 at a glance
| Population | 321 |
| Density | 11 per sq mi |
| Median household income | $250,001 |
| Home ownership | 72% |
Waste facilities and haulers nearby
Historical data: truck crashes in San Mateo 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 | — | — | 2.8 |
| 2000s | 77 | — | 2.2 |
| 2010s | 115 | +49% | 2.2 |
| 2020s | 102 | -11% | 2.2 |
Reported truck crashes averaged 77 a year in the 2000s and 102 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. Fatal crashes involving a large truck averaged 3.8 a year in 2016–19 and 2.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 94021
How many truck accidents are there in ZIP 94021?
1,319 truck crashes have been reported in San Mateo County since 2015, with 36 deaths and 630 injuries.
Which road has the most fatal truck crashes in ZIP 94021?
NHTSA data shows SR-1 with 3 fatal large-truck crashes within 10 miles of ZIP 94021 since 2015, the highest of any road.
When do most truck crashes happen in ZIP 94021?
Truck crashes in San Mateo County peak in June, with 10.8% of the year's crashes.
Are garbage truck crashes common in ZIP 94021?
Garbage trucks were involved in 40 reported crashes in San Mateo County since 2015 (3.0% of truck crashes).
What is the truck crash rate in ZIP 94021 compared with California?
The yearly rate is 15.7 truck crashes per 100,000 residents in San Mateo County, vs 33.2 for California.
How do I plan a garbage truck route in ZIP 94021?
Use the free Route Planner: enter your stops to get a risk score, safer alternatives and the low bridges on your route.
2026 is a partial year. Updated October 2026.