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Interstate 84
Fatal crashes 2015–2024 28Deaths 29Counties 5Latest data year 2024
FARS data are based on police crash reports and other sources; the drunk-driving measure is based on the highest BAC of any driver in the crash. Latest data year: 2024. The route is the trafficway recorded for each crash (FARS TWAY_ID); the same route number in another state has its own page.
Between 2015 and 2024, FARS records 28 fatal crashes on Interstate 84 in Utah, with 29 deaths.
That is 1.1% of the 2,577 fatal crashes in Utah over the same years. The ten-year crash count fell 7% from 30 in 2005–2014 to 28 in 2015–2024.
The crashes were concentrated in Morgan County (14), Box Elder County (11) and Davis County (1) and 2 other counties.
25.0% of the crashes had a driver reported as drinking (Utah: 22.7%) and 35.7% had a speeding-related driver (28.5%); pedestrians were 0.0% and motorcyclists 24.1% of those killed.
Fatal crashes per year
Route identification in FARS is consistent from 2000; earlier years are not shown. Shaded band: the ten-year window used for the shares below.
Compared with all fatal crashes in Utah
| Measure | Interstate 84 | Utah |
|---|---|---|
| Fatal crashes, 2015–2024 | 28 | 2,577 |
| Deaths, 2015–2024 | 29 | 2,824 |
| Deaths per fatal crash | 1.0 | 1.1 |
| Share of state fatal crashes | 1.1% | 100% |
| Change vs previous ten years | -7% | +14% |
Factor shares
Counties along the route
| # | County | Fatal crashes on I-84 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Morgan County | 14 | 50% | 22 |
| 2 | Box Elder County | 11 | 39% | 96 |
| 3 | Davis County | 1 | 4% | 138 |
| 4 | Summit County | 1 | 4% | 48 |
| 5 | Weber County | 1 | 4% | 207 |
Hour of day
Share of fatal crashes on Interstate 84 beginning in each hour, 2015–2024; tick marks the Utah share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 90–95 | 5 | 18% |
| Mile 15–20 | 3 | 11% |
| Mile 25–30 | 3 | 11% |
| Mile 95–100 | 3 | 11% |
| Mile 105–110 | 3 | 11% |
| Mile 5–10 | 2 | 7% |
Five-mile bins by FARS milepoint, the six with the most fatal crashes; 100% of crashes on the route have a milepoint. Milepoints are as recorded by the state and can restart at county or district lines.
Other routes in Utah
- Interstate 15 271
- US Route 89 185
- Interstate 80 89
- State Route 68 74
- Interstate 70 67
- US Route 6 67
- US Route 40 61
- US Route 191 40
- Interstate 215 34
- State Route 126 34
- State Route 201 29
- State Route 171 27
All routes and counties in Utah
Questions and answers
How many fatal crashes have there been on Interstate 84 in Utah?
28 fatal crashes with 29 deaths over 2015–2024, per NHTSA's FARS. The route is the trafficway recorded for the crash; the same numbered route in another state has its own page.
Which counties along Interstate 84 had the most fatal crashes?
Morgan County (14), Box Elder County (11), Davis County (1), Summit County (1) and Weber County (1).
What share of crashes on Interstate 84 involved alcohol or speeding?
25.0% had a driver reported as drinking and 35.7% a speeding-related driver, against 22.7% and 28.5% for all fatal crashes in Utah.
When do fatal crashes happen on Interstate 84?
39.3% of the crashes were between 6pm and 6am. The hour chart on this page shows the full distribution.
Provenance
Source: NHTSA Fatality Analysis Reporting System, annual national CSV files 2000–2024 (accident, vehicle and person tables), public domain. Route pages are built for signed Interstate, US and state routes with at least 20 fatal crashes in 2015–2024. Data through 31 Dec 2024; generated 30 Sep 2026. See methodology and corrections.