I-405: fatal crashes in every state
From 2015 to 2024, 232 fatal crashes on I-405 killed 253 people across the 2 states it runs through, the 38th most of 69 interstates. In 2024 there were 22 fatal crashes and 24 deaths on the road.
I-405 by state: fatal crashes, deaths and per mile
California has the most fatal crashes on I-405, 204 from 2015 to 2024. Each state's stretch is counted within that state; the per-mile figure needs 20 miles or more of road.
| State | Fatal crashes | Deaths | 2024 | Miles | Per 100 miles a year | |
|---|---|---|---|---|---|---|
| 1 | I-405 in California | 204 | 222 | 20 | No data | No data |
| 2 | I-405 in Washington | 26 | 27 | 2 | No data | No data |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Download every interstate in every state it crosses as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/deadliest-roads/i-405/, from NHTSA FARS (2024 Annual Report File).”
Mileage from the FHWA Interstate route log (table 1), the only figure here not counted from FARS.
Deaths on I-405 by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 22 | 24 |
| 2023 | 29 | 30 |
| 2022 | 26 | 27 |
| 2021 | 28 | 30 |
| 2020 | 19 | 22 |
| 2019 | 17 | 18 |
| 2018 | 18 | 21 |
| 2017 | 25 | 28 |
| 2016 | 24 | 29 |
| 2015 | 24 | 24 |
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
The heaviest slot is Friday, midnight to 4 am (the night from Thursday), with 20 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 | 7.3 percent, 17 fatal crashes | 4.3 percent, 10 fatal crashes | 2.2 percent, 5 fatal crashes | 2.6 percent, 6 fatal crashes | 1.3 percent, 3 fatal crashes | 2.6 percent, 6 fatal crashes |
| Mon | 5.2 percent, 12 fatal crashes | 1.7 percent, 4 fatal crashes | 1.3 percent, 3 fatal crashes | 1.3 percent, 3 fatal crashes | 0.9 percent, 2 fatal crashes | 2.6 percent, 6 fatal crashes |
| Tue | 2.2 percent, 5 fatal crashes | 1.7 percent, 4 fatal crashes | 0.4 percent, 1 fatal crash | 1.3 percent, 3 fatal crashes | 1.7 percent, 4 fatal crashes | 3.0 percent, 7 fatal crashes |
| Wed | 3.0 percent, 7 fatal crashes | 2.6 percent, 6 fatal crashes | 1.3 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 0.9 percent, 2 fatal crashes | 2.6 percent, 6 fatal crashes |
| Thu | 2.6 percent, 6 fatal crashes | 2.6 percent, 6 fatal crashes | 1.3 percent, 3 fatal crashes | 0.9 percent, 2 fatal crashes | 1.7 percent, 4 fatal crashes | 3.0 percent, 7 fatal crashes |
| Fri | 8.6 percent, 20 fatal crashes | 2.6 percent, 6 fatal crashes | 0.0 percent, 0 fatal crashes | 2.2 percent, 5 fatal crashes | 1.3 percent, 3 fatal crashes | 4.7 percent, 11 fatal crashes |
| Sat | 3.9 percent, 9 fatal crashes | 3.4 percent, 8 fatal crashes | 1.3 percent, 3 fatal crashes | 0.4 percent, 1 fatal crash | 1.3 percent, 3 fatal crashes | 4.3 percent, 10 fatal crashes |
By hour
By month
- Jan9.1%
- Feb4.7%
- Mar6.5%
- Apr10.8%
- May5.6%
- Jun8.2%
- Jul8.6%
- Aug9.9%
- Sep10.3%
- Oct9.9%
- Nov8.6%
- Dec7.8%
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-405 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 25%, a pedestrian in 19%, a rollover in 3.4%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 109 | 47% |
| Fixed object (tree, pole, barrier, ditch) | 59 | 25% |
| Pedestrian | 44 | 19% |
| Rollover | 8 | 3.4% |
| Other | 6 | 2.6% |
| Parked vehicle | 4 | 1.7% |
| Cyclist | 2 | 0.9% |
| 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 compare with the United States
A drinking driver was recorded in 31% of fatal crashes on I-405 from 2015 to 2024, about the US share; speeding in 40%, above the US share of 27%; a hit-and-run in 7.3%, about the US share; a driver recorded as distracted in 6.9%, about the US share; 38% of passenger-vehicle occupants killed with belt use known were unbelted, below the US share of 49%. Shares of fatal crashes from 2015 to 2024, against the share across all US roads.
| I-405 | US | ||
|---|---|---|---|
| On rural stretches | 2.6% | 43% | below the US share |
| In the dark, road unlit | 29% | 28% | about the same as the US share |
| A drinking driver | 31% | 26% | about the same as the US share |
| Speeding | 40% | 27% | above the US share |
| A distracted driver | 6.9% | 8.7% | about the same as the US share |
| Occupants killed unbelted | 38% | 49% | below the US share |
| Hit-and-run | 7.3% | 6.5% | about the same as the US share |
| A motorcycle involved | 19% | 16% | about the same as the US share |
| Pedestrians among the dead | 27% | 17% | above the US 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-405
- How many fatal crashes have there been on I-405?
- 232 fatal crashes killed 253 people on I-405 from 2015 to 2024, across the 2 states it runs through. In 2024 there were 22 fatal crashes and 24 deaths. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Which state has the most fatal crashes on I-405?
- California, with 204 fatal crashes and 222 deaths from 2015 to 2024; Washington is second with 26.
- When do fatal crashes on I-405 happen most often?
- The heaviest slot from 2015 to 2024 was Friday, midnight to 4 am (the night from Thursday), with 20 fatal crashes.
Other interstates
- I-10 3,274
- I-95 2,778
- I-40 2,208
- I-75 2,062
- I-20 1,789
- I-80 1,774
- I-5 1,745
- I-70 1,354
- I-35 1,241
- I-15 1,188
- I-90 996
- I-85 922
The deadliest roads in America, every interstate 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 every state, with ramps, frontage and service roads 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. The full method.