State Highway 55 in Idaho: fatal crashes
From 2015 to 2024, 66 fatal crashes on State Highway 55 in Idaho killed 71 people, the 5th most of any numbered road in Idaho. In 2024 there were 3 fatal crashes and 3 deaths on the road.
An state highway running through 5 counties of Idaho. All fatal crashes in Idaho.
Deaths on State Highway 55 in Idaho by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 3 | 3 |
| 2023 | 10 | 10 |
| 2022 | 6 | 7 |
| 2021 | 10 | 11 |
| 2020 | 11 | 12 |
| 2019 | 3 | 3 |
| 2018 | 9 | 9 |
| 2017 | 7 | 8 |
| 2016 | 4 | 5 |
| 2015 | 3 | 3 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on State Highway 55 in Idaho: the counties with the most fatal crashes
Canyon County had the most fatal crashes on State Highway 55 from 2015 to 2024: 19, with 21 deaths. Canyon, Boise and Valley counties together held 82% of fatal crashes in State Highway 55 in Idaho from 2015 to 2024; the 4 listed held 97%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Canyon County | 0 | 19 | 21 |
| 2 | Boise County | 1 | 19 | 20 |
| 3 | Valley County | 2 | 16 | 18 |
| 4 | Ada County | 0 | 10 | 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 State Highway 55 in Idaho
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 | 1.5 percent, 1 fatal crashes | 1.5 percent, 1 fatal crashes | 3.0 percent, 2 fatal crashes | 1.5 percent, 1 fatal crashes | 6.1 percent, 4 fatal crashes | 1.5 percent, 1 fatal crashes |
| Mon | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.5 percent, 3 fatal crashes | 10.6 percent, 7 fatal crashes | 3.0 percent, 2 fatal crashes | 1.5 percent, 1 fatal crashes |
| Tue | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crashes | 6.1 percent, 4 fatal crashes | 4.5 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 1.5 percent, 1 fatal crashes | 1.5 percent, 1 fatal crashes | 6.1 percent, 4 fatal crashes | 4.5 percent, 3 fatal crashes | 4.5 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crashes | 1.5 percent, 1 fatal crashes | 1.5 percent, 1 fatal crashes |
| Fri | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crashes | 9.1 percent, 6 fatal crashes | 3.0 percent, 2 fatal crashes | 4.5 percent, 3 fatal crashes |
| Sat | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crashes | 3.0 percent, 2 fatal crashes | 3.0 percent, 2 fatal crashes | 3.0 percent, 2 fatal crashes |
By hour
By month
- Jan3.0%
- Feb13.6%
- Mar3.0%
- Apr6.1%
- May4.5%
- Jun13.6%
- Jul7.6%
- Aug13.6%
- Sep1.5%
- Oct15.2%
- Nov12.1%
- Dec6.1%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes on State Highway 55 in Idaho first hit
The first harmful event was a collision with another vehicle in 49%; a fixed object such as a tree, pole or barrier in 23%, a rollover in 12%, a pedestrian in 9.1%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 32 | 49% |
| Fixed object (tree, pole, barrier, ditch) | 15 | 23% |
| Rollover | 8 | 12% |
| Pedestrian | 6 | 9.1% |
| Other | 3 | 4.5% |
| Cyclist | 2 | 3.0% |
| Parked vehicle | 0 | 0.0% |
| 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 State Highway 55 in Idaho compare with the state
A drinking driver was recorded in 17% of fatal crashes in State Highway 55 in Idaho from 2015 to 2024, below the Idaho share of 31%; speeding in 14%, below the Idaho share of 22%; a hit-and-run in 4.5%, above the Idaho share of 1.7%; a driver recorded as distracted in 14%, about the Idaho share; 45% of passenger-vehicle occupants killed with belt use known were unbelted, below the Idaho share of 58%. Shares of fatal crashes from 2015 to 2024, against the share across all of Idaho. A share is only given over 20 crashes.
| State Highway 55 | Idaho | ||
|---|---|---|---|
| On rural stretches | 58% | 75% | below the Idaho share |
| At or near an intersection | 26% | 21% | above the Idaho share |
| In the dark, road unlit | 17% | 27% | below the Idaho share |
| A drinking driver | 17% | 31% | below the Idaho share |
| Speeding | 14% | 22% | below the Idaho share |
| A distracted driver (as recorded) | 14% | 15% | about the same as the Idaho share |
| Occupants killed unbelted | 45% | 58% | below the Idaho share |
| Hit-and-run | 4.5% | 1.7% | above the Idaho share |
| A motorcycle involved | 11% | 14% | below the Idaho share |
| Pedestrians among the dead | 8.5% | 6.9% | above the Idaho 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 State Highway 55 in Idaho
- How many fatal crashes have there been on State Highway 55 in Idaho?
- 66 fatal crashes killed 71 people on State Highway 55 in Idaho from 2015 to 2024. In 2024 there were 3 fatal crashes and 3 deaths.
- Where on State Highway 55 in Idaho do the most fatal crashes happen?
- Canyon County had the most fatal crashes on State Highway 55 from 2015 to 2024: 19, with 21 deaths. Boise County was second with 19.
Other roads in Idaho with a page
All fatal crashes in Idaho, with every road ranked.
Where the State Highway 55 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as State Highway 55 in Idaho (filed under 6 spellings, such as "SR- 55", "SR-55", "SR-55 EAGLE RD", "SR-55 KARCHER RD"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.