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 66 numbered roads in Idaho. In 2024 there were 3 fatal crashes and 3 deaths on the road.
A 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 on 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
66 fatal crashes on State Highway 55 in Idaho 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 1 pm to 2 pm; the worst month is October.
| 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 crash | 1.5 percent, 1 fatal crash | 3.0 percent, 2 fatal crashes | 1.5 percent, 1 fatal crash | 6.1 percent, 4 fatal crashes | 1.5 percent, 1 fatal crash |
| 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 crash |
| Tue | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crash | 6.1 percent, 4 fatal crashes | 4.5 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 1.5 percent, 1 fatal crash | 1.5 percent, 1 fatal crash | 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 crash | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crash | 1.5 percent, 1 fatal crash | 1.5 percent, 1 fatal crash |
| Fri | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 1 fatal crash | 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 crash | 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
The largest difference from Idaho: from 2015 to 2024, 58% of fatal crashes on State Highway 55 in Idaho were on rural roads, against 75% across Idaho. Below the Idaho share: drinking drivers and unbelted occupants. Shares of fatal crashes from 2015 to 2024, against the share across all of Idaho. A share is only given over 20 crashes; above or below means more than chance would give on 66 crashes.
| State Highway 55 | Idaho | ||
|---|---|---|---|
| On rural stretches | 58% | 75% | below the Idaho share |
| At or near an intersection | 26% | 21% | about the same as the Idaho share |
| In the dark, road unlit | 17% | 27% | about the same as the Idaho share |
| A drinking driver | 17% | 31% | below the Idaho share |
| Speeding | 14% | 22% | about the same as 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% | about the same as the Idaho share |
| A motorcycle involved | 11% | 14% | about the same as the Idaho share |
| Pedestrians among the dead | 8.5% | 6.9% | about the same as 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 on 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. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- 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. 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.