ZIP 94521 (Concord, CA) truck route planning & crash data
Plan safer truck routes around ZIP 94521: 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 |
Contra Costa County sits below California on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. Where it is higher: injuries per crash, garbage-truck share and morning rush (6–10 am).
What stands out in Contra Costa County: 1 in 38 of truck crashes here involve garbage trucks: 2.6%, vs 1.6% in California.
Overview
Since 2015, 2,377 crashes involving commercial trucks have been reported in Contra Costa County. They injured 1,171 people and killed 73.
That averages about one truck crash every 2 days in fully reported years.
When crashes happen
August has the most truck crashes, 10.1% of the yearly total, while November has the fewest (7.3%).
Winter months (Nov–Mar) carry 40.8% of truck crashes, vs 40.2% for California.
More truck crashes happen at 8–9 am than at any other hour (7.8%).
0.1% of truck crashes here happened on snow, slush or ice, against 0.9% across California.
Where crashes happen
Within this area, I-680 had the most fatal crashes involving a large truck since 2015 (7). Next come SR-4 (6), Clayton Rd (1) and Merriewood Dr (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 94521 fleets
- Build extra time into August routes: it has the most truck crashes here.
- Check whether your routes use I-680, the road with the most fatal truck crashes in this area.
- Garbage-truck crashes here peak in February; review collection routes for that month.
- Morning starts matter: 26.3% 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
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) |
|---|---|
| I-680 | 7 |
| SR-4 | 6 |
| Clayton Rd | 1 |
| Merriewood Dr | 1 |
| Pacheco Blvd | 1 |
| Port Chicago Hwy | 1 |
| Reliez Valley Rd | 1 |
| SR-242 | 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 94521 at a glance
| Population | 41,909 |
| Density | 1,671 per sq mi |
| Median household income | $125,899 |
| Median home value | $852,749 |
| Home ownership | 74% |
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 |
From the 2000s to the 2020s, yearly reported truck crashes went from 123 to 207. Some of the change may reflect how crashes were reported. 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 94521
How common are truck crashes in ZIP 94521?
Contra Costa County has had 2,377 reported truck crashes since 2015, injuring 1,171 people and killing 73.
Where do fatal truck crashes happen most in ZIP 94521?
I-680 had 7 fatal crashes involving a large truck within 10 miles of ZIP 94521 since 2015, more than any other road.
Which month has the most truck crashes in ZIP 94521?
Truck crashes in Contra Costa County peak in August, with 10.1% of the year's crashes.
How many garbage truck crashes are there in ZIP 94521?
Garbage trucks were involved in 60 reported crashes in Contra Costa County since 2015 (2.5% of truck crashes).
How do truck crashes in ZIP 94521 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 94521?
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.