ZIP 94548 (Knightsen, CA) truck route planning & crash data
Plan safer truck routes around ZIP 94548: commercial truck and garbage truck crashes here and in Contra Costa 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
3.3 deaths per 100 garbage-truck crashes vs 3.1 for all trucks.
Deadliest roads
How Contra Costa County compares with California
Contra Costa County against California and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Contra Costa County stands out
Full comparison
| Measure (2015–2025) | Contra Costa County | California | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 17.7 | 33.2 | 49.7 | 47% below the state |
| Deaths per 100 crashes | 3.1 | 3.6 | 3.4 | 14% below the state |
| Injuries per crash | 0.48 | 0.44 | 0.49 | 1.1× the state |
| Garbage-truck share | 2.6% | 1.6% | 2.3% | 1.6× the state |
| On snow, slush or ice | 0.1% | 0.9% | 6.2% | 86% below the state |
| Morning rush (6–10 am) | 26.3% | 23.5% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 7.3% | 6.5% | 13.8% | 1.1× the state |
| Winter months (Nov–Mar) | 40.8% | 40.2% | 41.9% | same |
| After dark | 27.3% | 29.1% | 24.8% | same |
Compared with California, Contra Costa County is lower 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 Contra Costa County: 1 in 38 crashes involve a garbage truck (60 since 2015), vs 1.6% across California.
Overview
Contra Costa County has recorded 2,377 truck crashes since 2015, with 1,171 people injured and 73 killed.
In complete reporting years that works out to about one truck crash every 2 days.
When crashes happen
August has the most truck crashes, 10.1% of the yearly total, while November has the fewest (7.3%).
The five winter months (November to March) hold 40.8% of truck crashes, against 40.2% across California.
More truck crashes happen at 8–9 am than at any other hour (7.8%).
Road surface: 0.1% of truck crashes were on snow, slush or ice (California: 0.9%).
Where crashes happen
Within this area, SR-4 had the most fatal crashes involving a large truck since 2015 (11). Next come Vasco Rd (2), CR-MARSH Creek Road (1) and CR-VASCO Rd (1).
Garbage & waste trucks
Garbage and refuse trucks were involved in 60 crashes, 2.5% of the total, against 1.6% across California.
Garbage-truck crashes peak in February (15% of them).
They recorded 3.3 deaths per 100 crashes, against 3.1 for all trucks.
Route planning tips for ZIP 94548 fleets
- Plan August schedules with more margin; it is the worst month for truck crashes in Contra Costa County.
- Look at alternatives to SR-4 at busy times: it leads this area in fatal truck crashes.
- Waste haulers: February is the peak month for garbage-truck crashes in Contra Costa County.
- 26.3% of truck crashes happen between 6 and 10 am, above California; consider earlier or later starts where possible.
- 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 Contra Costa County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-4 | 11 |
| Vasco Rd | 2 |
| CR-MARSH Creek Road | 1 |
| CR-VASCO Rd | 1 |
| Neroly Rd | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Contra Costa County) |
|---|---|
| SR-4 | 21 |
| I-680 | 14 |
| Sr-4 W/B | 8 |
| Sr-4 E/B | 5 |
| Richmond Pkwy/Pittsburg Av | 5 |
| Clayton Rd | 4 |
| I-80 | 4 |
| Sr160 Sb/1500Ft N Wilbur Av | 3 |
ZIP 94548 at a glance
| Population | 832 |
| Density | 139 per sq mi |
| Median household income | $189,653 |
| Home ownership | 100% |
Waste facilities and haulers nearby
Historical data: truck crashes in Contra Costa 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 | — | — | 4.8 |
| 2000s | 123 | — | 4.4 |
| 2010s | 176 | +43% | 3.7 |
| 2020s | 207 | +17% | 6.2 |
In the 2000s about 123 truck crashes a year were reported; in the 2020s, about 207. Reporting coverage also changed between these periods. Fatal crashes involving a large truck averaged 5.8 a year in 2016–19 and 6.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 94548
How many truck crashes happen in ZIP 94548?
Contra Costa County has had 2,377 reported truck crashes since 2015, injuring 1,171 people and killing 73.
Which road has the most fatal truck crashes in ZIP 94548?
SR-4 had 11 fatal crashes involving a large truck within 10 miles of ZIP 94548 since 2015, more than any other road.
What is the worst month for truck crashes in ZIP 94548?
The worst month is August: 10.1% of truck crashes in Contra Costa County happen then.
Are garbage truck crashes common in ZIP 94548?
Since 2015, Contra Costa County has reported 60 garbage-truck crashes, or 2.5% of its truck crashes.
How do truck crashes in ZIP 94548 compare with California?
Contra Costa County records 17.7 truck crashes per 100,000 residents a year, against 33.2 across California.
What is the best way to plan truck routes in ZIP 94548?
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.