I-405 in California: fatal crashes
From 2015 to 2024, 204 fatal crashes on I-405 in California killed 222 people, the 12th most of any numbered road in California. In 2024 there were 20 fatal crashes and 22 deaths on the road.
An interstate running through 2 counties of California. All fatal crashes in California. I-405 in every state.
Deaths on I-405 in California by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 20 | 22 |
| 2023 | 25 | 25 |
| 2022 | 23 | 24 |
| 2021 | 27 | 29 |
| 2020 | 16 | 18 |
| 2019 | 12 | 12 |
| 2018 | 17 | 20 |
| 2017 | 22 | 25 |
| 2016 | 22 | 27 |
| 2015 | 20 | 20 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on I-405 in California: the counties with the most fatal crashes
Los Angeles County County had the most fatal crashes on I-405 from 2015 to 2024: 133, with 146 deaths. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Los Angeles County | 11 | 133 | 146 |
| 2 | Orange County | 9 | 71 | 76 |
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-405 in California
The heaviest slot is Friday, midnight to 4 am, with 19 fatal crashes from 2015 to 2024. The worst hour is 2 am to 3 am; the worst month is April.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 7.4 percent, 15 fatal crashes | 4.9 percent, 10 fatal crashes | 2.5 percent, 5 fatal crashes | 2.9 percent, 6 fatal crashes | 1.5 percent, 3 fatal crashes | 2.5 percent, 5 fatal crashes |
| Mon | 4.9 percent, 10 fatal crashes | 2.0 percent, 4 fatal crashes | 1.0 percent, 2 fatal crashes | 1.0 percent, 2 fatal crashes | 1.0 percent, 2 fatal crashes | 2.9 percent, 6 fatal crashes |
| Tue | 2.5 percent, 5 fatal crashes | 1.5 percent, 3 fatal crashes | 0.5 percent, 1 fatal crashes | 1.0 percent, 2 fatal crashes | 1.5 percent, 3 fatal crashes | 2.9 percent, 6 fatal crashes |
| Wed | 2.9 percent, 6 fatal crashes | 2.5 percent, 5 fatal crashes | 1.0 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 1.0 percent, 2 fatal crashes | 2.5 percent, 5 fatal crashes |
| Thu | 2.9 percent, 6 fatal crashes | 2.9 percent, 6 fatal crashes | 1.0 percent, 2 fatal crashes | 1.0 percent, 2 fatal crashes | 1.5 percent, 3 fatal crashes | 2.5 percent, 5 fatal crashes |
| Fri | 9.3 percent, 19 fatal crashes | 2.5 percent, 5 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 3 fatal crashes | 1.5 percent, 3 fatal crashes | 3.9 percent, 8 fatal crashes |
| Sat | 3.4 percent, 7 fatal crashes | 3.9 percent, 8 fatal crashes | 1.5 percent, 3 fatal crashes | 0.5 percent, 1 fatal crashes | 1.5 percent, 3 fatal crashes | 4.9 percent, 10 fatal crashes |
By hour
By month
- Jan9.3%
- Feb5.4%
- Mar7.4%
- Apr11.3%
- May5.9%
- Jun7.4%
- Jul7.4%
- Aug10.3%
- Sep9.3%
- Oct9.8%
- Nov8.3%
- Dec8.3%
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-405 in California first hit
The first harmful event was a collision with another vehicle in 47%; a fixed object such as a tree, pole or barrier in 24%, a pedestrian in 20%, a rollover in 3.4%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 96 | 47% |
| Fixed object (tree, pole, barrier, ditch) | 49 | 24% |
| Pedestrian | 41 | 20% |
| Rollover | 7 | 3.4% |
| Other | 5 | 2.5% |
| Parked vehicle | 4 | 2.0% |
| Cyclist | 2 | 1.0% |
| 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-405 in California compare with the state
A drinking driver was recorded in 29% of fatal crashes in I-405 in California from 2015 to 2024, above the California share of 28%; speeding in 39%, above the California share of 30%; a hit-and-run in 7.4%, below the California share of 11%; a driver recorded as distracted in 5.4%, above the California share of 4.1%; 39% of passenger-vehicle occupants killed with belt use known were unbelted, about the California share. Shares of fatal crashes from 2015 to 2024, against the share across all of California. A share is only given over 20 crashes.
| I-405 | California | ||
|---|---|---|---|
| On rural stretches | 2.9% | 30% | below the California share |
| At or near an intersection | 0.0% | 27% | below the California share |
| In the dark, road unlit | 30% | 25% | above the California share |
| A drinking driver | 29% | 28% | above the California share |
| Speeding | 39% | 30% | above the California share |
| A distracted driver (as recorded) | 5.4% | 4.1% | above the California share |
| Occupants killed unbelted | 39% | 38% | about the same as the California share |
| Hit-and-run | 7.4% | 11% | below the California share |
| A motorcycle involved | 19% | 15% | above the California share |
| Pedestrians among the dead | 28% | 26% | above 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-405 in California
- How many fatal crashes have there been on I-405 in California?
- 204 fatal crashes killed 222 people on I-405 in California from 2015 to 2024. In 2024 there were 20 fatal crashes and 22 deaths.
- Where on I-405 in California do the most fatal crashes happen?
- Los Angeles County had the most fatal crashes on I-405 from 2015 to 2024: 133, with 146 deaths. Orange County was second with 71.
- When do fatal crashes on I-405 in California happen most often?
- The heaviest slot from 2015 to 2024 was Friday, midnight to 4 am, with 19 fatal crashes.
Other roads in California with a page
All fatal crashes in California, with every road ranked.
Where the I-405 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as I-405 in California (filed under 9 spellings, such as "I-405", "I-405 N/B (SAN DIEGO FWY)", "I-405 NB", "I-405 NB SAN DIEGO FWY"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.