I-55 in Missouri: fatal crashes
From 2015 to 2024, 175 fatal crashes on I-55 in Missouri killed 190 people, the 3rd most of any numbered road in Missouri. In 2024 there were 17 fatal crashes and 19 deaths on the road.
An interstate running through 10 counties of Missouri. All fatal crashes in Missouri. I-55 in every state.
Deaths on I-55 in Missouri by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 17 | 19 |
| 2023 | 15 | 15 |
| 2022 | 17 | 21 |
| 2021 | 19 | 22 |
| 2020 | 11 | 12 |
| 2019 | 16 | 17 |
| 2018 | 14 | 15 |
| 2017 | 30 | 33 |
| 2016 | 17 | 17 |
| 2015 | 19 | 19 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on I-55 in Missouri: the counties with the most fatal crashes
Jefferson County County had the most fatal crashes on I-55 from 2015 to 2024: 38, with 40 deaths. Jefferson, St. Louis and St. Louis city together held 49% of fatal crashes in I-55 in Missouri from 2015 to 2024; the 9 listed held 99%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Jefferson County | 2 | 38 | 40 |
| 2 | St. Louis County | 6 | 24 | 28 |
| 3 | St. Louis city | 1 | 23 | 24 |
| 4 | Pemiscot County | 3 | 21 | 21 |
| 5 | Cape Girardeau County | 2 | 18 | 21 |
| 6 | Scott County | 2 | 16 | 18 |
| 7 | Ste. Genevieve County | 1 | 15 | 16 |
| 8 | New Madrid County | 0 | 13 | 15 |
| 9 | Perry County | 0 | 6 | 6 |
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-55 in Missouri
The heaviest slot is Sunday, noon to 4 pm, with 10 fatal crashes from 2015 to 2024. The worst hour is 6 pm to 7 pm; the worst month is December.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 5.1 percent, 9 fatal crashes | 1.1 percent, 2 fatal crashes | 1.7 percent, 3 fatal crashes | 5.7 percent, 10 fatal crashes | 4.0 percent, 7 fatal crashes | 1.7 percent, 3 fatal crashes |
| Mon | 0.6 percent, 1 fatal crashes | 1.7 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 2.9 percent, 5 fatal crashes | 1.1 percent, 2 fatal crashes | 2.3 percent, 4 fatal crashes |
| Tue | 0.0 percent, 0 fatal crashes | 2.3 percent, 4 fatal crashes | 3.4 percent, 6 fatal crashes | 1.7 percent, 3 fatal crashes | 3.4 percent, 6 fatal crashes | 4.0 percent, 7 fatal crashes |
| Wed | 3.4 percent, 6 fatal crashes | 0.6 percent, 1 fatal crashes | 3.4 percent, 6 fatal crashes | 2.9 percent, 5 fatal crashes | 1.1 percent, 2 fatal crashes | 2.3 percent, 4 fatal crashes |
| Thu | 1.7 percent, 3 fatal crashes | 1.1 percent, 2 fatal crashes | 0.6 percent, 1 fatal crashes | 2.9 percent, 5 fatal crashes | 2.9 percent, 5 fatal crashes | 2.9 percent, 5 fatal crashes |
| Fri | 1.1 percent, 2 fatal crashes | 1.1 percent, 2 fatal crashes | 2.3 percent, 4 fatal crashes | 2.3 percent, 4 fatal crashes | 5.1 percent, 9 fatal crashes | 3.4 percent, 6 fatal crashes |
| Sat | 5.1 percent, 9 fatal crashes | 2.3 percent, 4 fatal crashes | 0.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 4.0 percent, 7 fatal crashes | 4.0 percent, 7 fatal crashes |
By hour
By month
- Jan5.1%
- Feb5.1%
- Mar9.7%
- Apr8.6%
- May9.7%
- Jun8.0%
- Jul9.1%
- Aug7.4%
- Sep8.0%
- Oct8.6%
- Nov8.0%
- Dec12.6%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Fatal crashes per mile on I-55 in Missouri
8.38 fatal crashes a year per 100 miles over 2015 to 2024, on 209 miles of I-55 in Missouri, against 9.37 for all interstates in Missouri. That ranks 3 of 4 interstates in Missouri and 82 of 171 interstate pages on this site.
Mileage from the FHWA Interstate route log (table 1), the only figure here not counted from FARS. Crashes per mile of road, not per vehicle: FARS records crashes, not traffic.
What fatal crashes on I-55 in Missouri first hit
The first harmful event was a collision with another vehicle in 35%; a fixed object such as a tree, pole or barrier in 35%, a rollover in 13%, a pedestrian in 11%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 62 | 35% |
| Fixed object (tree, pole, barrier, ditch) | 61 | 35% |
| Rollover | 22 | 13% |
| Pedestrian | 19 | 11% |
| Parked vehicle | 6 | 3.4% |
| Other | 5 | 2.9% |
| Cyclist | 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 I-55 in Missouri compare with the state
A drinking driver was recorded in 23% of fatal crashes in I-55 in Missouri from 2015 to 2024, below the Missouri share of 28%; speeding in 29%, below the Missouri share of 37%; a hit-and-run in 6.3%, above the Missouri share of 5.2%; a driver recorded as distracted in 9.1%, about the Missouri share; 62% of passenger-vehicle occupants killed with belt use known were unbelted, below the Missouri share of 63%. Shares of fatal crashes from 2015 to 2024, against the share across all of Missouri. A share is only given over 20 crashes.
| I-55 | Missouri | ||
|---|---|---|---|
| On rural stretches | 42% | 52% | below the Missouri share |
| At or near an intersection | 0.0% | 21% | below the Missouri share |
| In the dark, road unlit | 35% | 28% | above the Missouri share |
| A drinking driver | 23% | 28% | below the Missouri share |
| Speeding | 29% | 37% | below the Missouri share |
| A distracted driver (as recorded) | 9.1% | 8.9% | about the same as the Missouri share |
| Occupants killed unbelted | 62% | 63% | below the Missouri share |
| Hit-and-run | 6.3% | 5.2% | above the Missouri share |
| A motorcycle involved | 8.0% | 15% | below the Missouri share |
| Pedestrians among the dead | 13% | 12% | above the Missouri 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 I-55 in Missouri
- How many fatal crashes have there been on I-55 in Missouri?
- 175 fatal crashes killed 190 people on I-55 in Missouri from 2015 to 2024. In 2024 there were 17 fatal crashes and 19 deaths.
- Where on I-55 in Missouri do the most fatal crashes happen?
- Jefferson County had the most fatal crashes on I-55 from 2015 to 2024: 38, with 40 deaths. St. Louis County was second with 24.
- When do fatal crashes on I-55 in Missouri happen most often?
- The heaviest slot from 2015 to 2024 was Sunday, noon to 4 pm, with 10 fatal crashes.
- How dangerous is I-55 in Missouri per mile?
- 8.38 fatal crashes a year per 100 miles over 2015 to 2024, on 209 miles of road, against 9.37 for all interstates in Missouri. That ranks 3 of 4 interstates in Missouri and 82 of 171 interstate pages on this site. FARS records crashes, not traffic, so this is crashes per mile of road, not per vehicle.
Other roads in Missouri with a page
- I-270
- I-435
- I-44
- I-49
- I-70
- State Highway 100
- State Highway 13
- State Highway 21
- State Highway 30
- State Highway 32
- State Highway 43
- State Highway 5
All fatal crashes in Missouri, with every road ranked.
Where the I-55 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as I-55 in Missouri (filed under 12 spellings, such as "I- 55 RP 126", "I-55", "I-55 EAST OUTER RD", "I-55 EOR"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.