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Interstate 55
Fatal crashes 2015–2024 52Deaths 57Counties 2Latest 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 52 fatal crashes on Interstate 55 in Louisiana, with 57 deaths.
That is 0.7% of the 7,467 fatal crashes in Louisiana over the same years. The ten-year crash count fell 30% from 74 in 2005–2014 to 52 in 2015–2024.
The crashes were concentrated in Tangipahoa Parish (40) and St. John the Baptist Parish (12).
36.5% of the crashes had a driver reported as drinking (Louisiana: 30.9%) and 30.8% had a speeding-related driver (22.4%); pedestrians were 12.3% and motorcyclists 7.0% 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 Louisiana
| Measure | Interstate 55 | Louisiana |
|---|---|---|
| Fatal crashes, 2015–2024 | 52 | 7,467 |
| Deaths, 2015–2024 | 57 | 8,045 |
| Deaths per fatal crash | 1.1 | 1.1 |
| Share of state fatal crashes | 0.7% | 100% |
| Change vs previous ten years | -30% | 0% |
Factor shares
Counties along the route
| # | County | Fatal crashes on I-55 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Tangipahoa Parish | 40 | 77% | 300 |
| 2 | St. John the Baptist Parish | 12 | 23% | 95 |
Hour of day
Share of fatal crashes on Interstate 55 beginning in each hour, 2015–2024; tick marks the Louisiana share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 10–15 | 7 | 13% |
| Mile 25–30 | 7 | 13% |
| Mile 30–35 | 7 | 13% |
| Mile 40–45 | 7 | 13% |
| Mile 20–25 | 5 | 10% |
| Mile 35–40 | 4 | 8% |
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 Louisiana
- Interstate 10 472
- US Route 90 298
- US Route 61 240
- US Route 190 187
- State Route 1 173
- Interstate 20 169
- Interstate 12 147
- Interstate 49 118
- US Route 165 115
- US Route 167 107
- US Route 71 98
- US Route 171 88
All routes and counties in Louisiana
Questions and answers
How many fatal crashes have there been on Interstate 55 in Louisiana?
52 fatal crashes with 57 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 55 had the most fatal crashes?
Tangipahoa Parish (40) and St. John the Baptist Parish (12).
What share of crashes on Interstate 55 involved alcohol or speeding?
36.5% had a driver reported as drinking and 30.8% a speeding-related driver, against 30.9% and 22.4% for all fatal crashes in Louisiana.
When do fatal crashes happen on Interstate 55?
56.9% 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.