I-680 in California: fatal crashes
From 2015 to 2024, 121 fatal crashes on I-680 in California killed 131 people. In 2024 there were 15 fatal crashes and 15 deaths on the road.
An interstate running through 4 counties of California. All fatal crashes in California. I-680 in every state.
Deaths on I-680 in California by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 15 | 15 |
| 2023 | 12 | 14 |
| 2022 | 9 | 9 |
| 2021 | 16 | 18 |
| 2020 | 16 | 20 |
| 2019 | 10 | 10 |
| 2018 | 8 | 8 |
| 2017 | 10 | 10 |
| 2016 | 18 | 19 |
| 2015 | 7 | 8 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on I-680 in California: the counties with the most fatal crashes
Contra Costa County had the most fatal crashes on I-680 from 2015 to 2024: 48, with 53 deaths. Contra Costa, Alameda and Santa Clara counties together held 93% of fatal crashes in I-680 in California from 2015 to 2024; the 4 listed held 100%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Contra Costa County | 5 | 48 | 53 |
| 2 | Alameda County | 4 | 36 | 40 |
| 3 | Santa Clara County | 3 | 28 | 28 |
| 4 | Solano County | 3 | 9 | 10 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen on I-680 in California
Too few crashes to name a heaviest slot. The grid shows the shares; a share is only given over 20 crashes.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 2.5 percent, 3 fatal crashes | 4.2 percent, 5 fatal crashes | 0.8 percent, 1 fatal crashes | 2.5 percent, 3 fatal crashes | 1.7 percent, 2 fatal crashes | 4.2 percent, 5 fatal crashes |
| Mon | 6.7 percent, 8 fatal crashes | 3.4 percent, 4 fatal crashes | 3.4 percent, 4 fatal crashes | 1.7 percent, 2 fatal crashes | 1.7 percent, 2 fatal crashes | 3.4 percent, 4 fatal crashes |
| Tue | 0.8 percent, 1 fatal crashes | 2.5 percent, 3 fatal crashes | 2.5 percent, 3 fatal crashes | 1.7 percent, 2 fatal crashes | 0.8 percent, 1 fatal crashes | 4.2 percent, 5 fatal crashes |
| Wed | 2.5 percent, 3 fatal crashes | 2.5 percent, 3 fatal crashes | 2.5 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 3.4 percent, 4 fatal crashes | 2.5 percent, 3 fatal crashes |
| Thu | 1.7 percent, 2 fatal crashes | 3.4 percent, 4 fatal crashes | 0.0 percent, 0 fatal crashes | 0.8 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 1.7 percent, 2 fatal crashes |
| Fri | 3.4 percent, 4 fatal crashes | 3.4 percent, 4 fatal crashes | 0.8 percent, 1 fatal crashes | 0.8 percent, 1 fatal crashes | 1.7 percent, 2 fatal crashes | 4.2 percent, 5 fatal crashes |
| Sat | 5.9 percent, 7 fatal crashes | 5.0 percent, 6 fatal crashes | 1.7 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 3.4 percent, 4 fatal crashes |
By hour
By month
- Jan7.4%
- Feb5.8%
- Mar9.1%
- Apr9.1%
- May5.8%
- Jun8.3%
- Jul6.6%
- Aug9.1%
- Sep15.7%
- Oct9.1%
- Nov8.3%
- Dec5.8%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes on I-680 in California first hit
The first harmful event was a fixed object such as a tree, pole or barrier in 39%; a collision with another vehicle in 29%, a pedestrian in 16%, a rollover in 5.8%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Fixed object (tree, pole, barrier, ditch) | 47 | 39% |
| Collision with another vehicle | 35 | 29% |
| Pedestrian | 19 | 16% |
| Rollover | 7 | 5.8% |
| Parked vehicle | 6 | 5.0% |
| Other | 6 | 5.0% |
| Cyclist | 1 | 0.8% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes on I-680 in California compare with the state
A drinking driver was recorded in 26% of fatal crashes in I-680 in California from 2015 to 2024, below the California share of 28%; speeding in 35%, above the California share of 30%; a hit-and-run in 8.3%, below the California share of 11%; a driver recorded as distracted in 2.5%, below the California share of 4.1%; 33% of passenger-vehicle occupants killed with belt use known were unbelted, below the California share of 38%. Shares of fatal crashes from 2015 to 2024, against the share across all of California. A share is only given over 20 crashes.
| I-680 | California | ||
|---|---|---|---|
| On rural stretches | 12% | 30% | below the California share |
| At or near an intersection | 0.0% | 27% | below the California share |
| In the dark, road unlit | 32% | 25% | above the California share |
| A drinking driver | 26% | 28% | below the California share |
| Speeding | 35% | 30% | above the California share |
| A distracted driver (as recorded) | 2.5% | 4.1% | below the California share |
| Occupants killed unbelted | 33% | 38% | below the California share |
| Hit-and-run | 8.3% | 11% | below the California share |
| A motorcycle involved | 9.9% | 15% | below the California share |
| Pedestrians among the dead | 16% | 26% | below the California share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes in I-680 in California
- How many fatal crashes have there been on I-680 in California?
- 121 fatal crashes killed 131 people on I-680 in California from 2015 to 2024. In 2024 there were 15 fatal crashes and 15 deaths.
- Where on I-680 in California do the most fatal crashes happen?
- Contra Costa County had the most fatal crashes on I-680 from 2015 to 2024: 48, with 53 deaths. Alameda County was second with 36.
Other roads in California with a page
All fatal crashes in California, with every road ranked.
Where the I-680 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as I-680 in California (filed under 6 spellings, such as "I-680", "I-680 DONALD D DOYLE FWY", "I-680 DONALD D DOYLE HWY", "I-680 S/B"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.