Fatal crash rate · Idaho · Road
Fatal crashes on I-84 in Idaho
Every fatal crash NHTSA coded to Interstate 84 in Idaho, 2020 to 2024, with the year, the county and what the record says about each. Fatal crashes only, and a count, not a rate: the federal record has no traffic volume for a road.
I-84 in Idaho2020 to 2024 · fatal crashes recorded by NHTSA
87fatal crashes over five years · 91 deaths
Over 2020 to 2024, NHTSA recorded 87 fatal crashes on I-84 in Idaho, in which 91 people died. That is 8% of the 1,089 fatal crashes recorded in Idaho in those years, about 17 a year. 5 of the 87 were coded to a ramp, frontage or service road of I-84 rather than the main lanes. In 2024, the latest year, 15 were recorded.
- Counted
- FARS crashes 2020 to 2024 in Idaho whose TWAY_ID or TWAY_ID2 begins I-84
- Share
- 87 ÷ 1,089 fatal crashes in Idaho = 8%
Every year, 2020 to 2024
| Year | Fatal crashes on I-84 | Deaths | Fatal crashes in Idaho | Share |
|---|---|---|---|---|
| 2020 | 13 | 15 | 188 | 7% |
| 2021 | 24 | 25 | 246 | 10% |
| 2022 | 14 | 14 | 194 | 7% |
| 2023 | 21 | 22 | 242 | 9% |
| 2024 | 15 | 15 | 219 | 7% |
2024 is NHTSA’s Annual Report File and will be revised when the final file replaces it.
Where on I-84: by county, 2020 to 2024
The counties the crashes were coded to, alphabetical. A road’s count in a county depends on how many miles of it run there and how busy they are; the page does not rank the counties. Each name opens the county page with its own rate.
What the record says about those crashes, 2020 to 2024
Every figure is a count of the 87 fatal crashes NHTSA coded to I-84 in Idaho over five years, from the fields FARS records. Nothing is estimated or inferred.
| Road type | Crashes | Share |
|---|---|---|
| Interstate | 82 | 94% |
| Other freeway or expressway | 0 | 0% |
| Other principal arterial | 5 | 6% |
| Minor arterial | 0 | 0% |
| Major collector | 0 | 0% |
| Minor collector | 0 | 0% |
| Local road | 0 | 0% |
| Unknown or not reported | 0 | 0% |
| Rural | 66 | 76% |
| Urban | 21 | 24% |
| Time of day | Crashes | Share |
|---|---|---|
| Midnight to 5:59 am | 19 | 22% |
| 6 am to 11:59 am | 27 | 31% |
| Noon to 5:59 pm | 23 | 26% |
| 6 pm to 11:59 pm | 18 | 21% |
| Hour unknown | 0 | 0% |
| Light | Crashes | Share |
|---|---|---|
| Daylight | 47 | 54% |
| Dark, not lighted (or lighting unknown) | 26 | 30% |
| Dark, lighted | 8 | 9% |
| Dawn or dusk | 6 | 7% |
| Unknown or not reported | 0 | 0% |
| Day of week | Crashes | Share |
|---|---|---|
| Sunday | 11 | 13% |
| Monday | 8 | 9% |
| Tuesday | 11 | 13% |
| Wednesday | 18 | 21% |
| Thursday | 7 | 8% |
| Friday | 15 | 17% |
| Saturday | 17 | 20% |
| Month | Crashes | Share |
|---|---|---|
| January | 10 | 11% |
| February | 0 | 0% |
| March | 11 | 13% |
| April | 4 | 5% |
| May | 7 | 8% |
| June | 4 | 5% |
| July | 4 | 5% |
| August | 8 | 9% |
| September | 11 | 13% |
| October | 11 | 13% |
| November | 9 | 10% |
| December | 8 | 9% |
| Weather | Crashes | Share |
|---|---|---|
| Clear | 66 | 76% |
| Cloudy | 6 | 7% |
| Rain | 2 | 2% |
| Snow, sleet or freezing rain | 9 | 10% |
| Fog, smog or smoke | 2 | 2% |
| Severe wind, blowing sand or other | 2 | 2% |
| Unknown or not reported | 0 | 0% |
| Involving | Crashes | Share |
|---|---|---|
| A pedestrian | 10 | 11% |
| A bicyclist or other cyclist | 0 | 0% |
| A speeding-related vehicle | 18 | 21% |
| A driver police reported as drinking | 13 | 15% |
| A large truck (over 10,000 lb) | 29 | 33% |
| A motorcycle | 5 | 6% |
| A hit-and-run vehicle | 2 | 2% |
| A teen driver (15 to 19) | 11 | 13% |
Road type is FARS FUNC_SYS for the crash, which can differ from the route’s class where a crash was coded on a frontage road or ramp; speeding is any vehicle coded SPEEDREL 2 to 5; drinking is any driver coded DRINKING = 1 (police-reported, not a blood-alcohol test).
How this is counted
- The road is the designation FARS wrote. Each crash in NHTSA’s Fatality Analysis Reporting System names the trafficway it was on (
TWAY_ID) and, at an intersection, a second one (TWAY_ID2). NHTSA standardises the route designation (I-45,US-59,SR-6) and the police often add a local name after it (I-45/NORTH FWY) or a ramp or frontage word. The page counts every crash whose designation is I-84, once, whatever followed it. Nothing else is matched: a crash coded only to a local street name is not here even if that street is this road. - Same number, another state, another road. I-84 in Idaho is counted within Idaho only. Where the route continues into a neighbouring state it has its own page there, and a State Route number means nothing outside its state.
- Only roads with ten or more fatal crashes over 2020 to 2024 have a page. Fewer is too few to say anything, and the county page already lists the most-named roads in each county as the police wrote them.
- No rate, no rank. The Idaho page lists every numbered road in route order with its count and nothing else. Roads with more lanes, more miles or more traffic record more fatal crashes; the record cannot separate those from the road’s design.
Informational only, not professional advice. Last reviewed: October 2026. Data snapshot built 2026-10-30.
Other roads in Idaho
- I-15 37
- I-86 11
- I-90 16
- SR-21 13
- SR-25 10
- SR-33 16
- SR-55 42
- SR-75 15
- US-12 25
- US-20 63
- US-26 22
- US-30 24
- US-91 15
- US-93 33
- US-95 86
In route order, first thirty; the full list is on the Idaho page.