I-680 in California: fatal crashes
From 2015 to 2024, 121 fatal crashes on I-680 in California killed 131 people, the 28th most of 255 numbered roads in California. 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 on I-680 in California from 2015 to 2024. 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
119 fatal crashes on I-680 in California from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. The worst hour is 10 pm to 11 pm; the worst month is September.
| 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 crash | 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 crash | 2.5 percent, 3 fatal crashes | 2.5 percent, 3 fatal crashes | 1.7 percent, 2 fatal crashes | 0.8 percent, 1 fatal crash | 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 crash | 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 crash | 0.8 percent, 1 fatal crash | 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
The largest difference from California: from 2015 to 2024, 0.0% of fatal crashes on I-680 in California were at or near an intersection, against 27% across California. Below the California share: rural roads and pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of California. A share is only given over 20 crashes; above or below means more than chance would give on 121 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% | about the same as the California share |
| A drinking driver | 26% | 28% | about the same as the California share |
| Speeding | 35% | 30% | about the same as the California share |
| A distracted driver (as recorded) | 2.5% | 4.1% | about the same as the California share |
| Occupants killed unbelted | 33% | 38% | about the same as the California share |
| Hit-and-run | 8.3% | 11% | about the same as the California share |
| A motorcycle involved | 9.9% | 15% | about the same as 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 on 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. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- 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. Where two routes share a road, NHTSA files each crash under one of them, so a shared stretch counts on one route only. A fatal crash is one in which someone died within 30 days. Totals in state and news reports for a road usually differ: they include ramps and frontage roads, or count from preliminary reports. The full method.