I-84 in Connecticut: fatal crashes
From 2015 to 2024, 118 fatal crashes on I-84 in Connecticut killed 133 people, the 2nd most of any numbered road in Connecticut. In 2024 there were 11 fatal crashes and 12 deaths on the road.
An interstate running through 5 counties of Connecticut. All fatal crashes in Connecticut.
Deaths on I-84 in Connecticut by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 11 | 12 |
| 2023 | 15 | 17 |
| 2022 | 15 | 20 |
| 2021 | 22 | 23 |
| 2020 | 9 | 10 |
| 2019 | 8 | 10 |
| 2018 | 7 | 8 |
| 2017 | 8 | 8 |
| 2016 | 9 | 10 |
| 2015 | 14 | 15 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on I-84 in Connecticut: the counties with the most fatal crashes
Hartford County County had the most fatal crashes on I-84 from 2015 to 2024: 65, with 75 deaths. Hartford, New Haven and Fairfield counties together held 88% of fatal crashes in I-84 in Connecticut from 2015 to 2024; the 4 listed held 99%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Hartford County | 7 | 65 | 75 |
| 2 | New Haven County | 1 | 24 | 28 |
| 3 | Fairfield County | 1 | 15 | 15 |
| 4 | Tolland County | 2 | 13 | 14 |
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-84 in Connecticut
Too few crashes to name a heaviest slot. The grid shows the shares; a share is only given over 20 crashes.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 6.0 percent, 7 fatal crashes | 0.9 percent, 1 fatal crashes | 0.9 percent, 1 fatal crashes | 1.7 percent, 2 fatal crashes | 2.6 percent, 3 fatal crashes | 3.4 percent, 4 fatal crashes |
| Mon | 5.1 percent, 6 fatal crashes | 1.7 percent, 2 fatal crashes | 0.9 percent, 1 fatal crashes | 1.7 percent, 2 fatal crashes | 2.6 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Tue | 0.9 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 1.7 percent, 2 fatal crashes | 1.7 percent, 2 fatal crashes | 2.6 percent, 3 fatal crashes | 2.6 percent, 3 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 1.7 percent, 2 fatal crashes | 3.4 percent, 4 fatal crashes | 2.6 percent, 3 fatal crashes | 5.1 percent, 6 fatal crashes | 2.6 percent, 3 fatal crashes |
| Thu | 0.9 percent, 1 fatal crashes | 3.4 percent, 4 fatal crashes | 2.6 percent, 3 fatal crashes | 3.4 percent, 4 fatal crashes | 6.8 percent, 8 fatal crashes | 4.3 percent, 5 fatal crashes |
| Fri | 2.6 percent, 3 fatal crashes | 0.9 percent, 1 fatal crashes | 0.9 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 0.9 percent, 1 fatal crashes | 4.3 percent, 5 fatal crashes |
| Sat | 6.8 percent, 8 fatal crashes | 1.7 percent, 2 fatal crashes | 2.6 percent, 3 fatal crashes | 0.9 percent, 1 fatal crashes | 3.4 percent, 4 fatal crashes | 1.7 percent, 2 fatal crashes |
By hour
By month
- Jan4.2%
- Feb10.2%
- Mar5.9%
- Apr7.6%
- May8.5%
- Jun10.2%
- Jul9.3%
- Aug10.2%
- Sep5.9%
- Oct5.9%
- Nov10.2%
- Dec11.9%
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-84 in Connecticut
12.05 fatal crashes a year per 100 miles over 2015 to 2024, on 98 miles of I-84 in Connecticut, against 14.35 for all interstates in Connecticut. That ranks 3 of 3 interstates in Connecticut and 50 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-84 in Connecticut first hit
The first harmful event was a collision with another vehicle in 46%; a fixed object such as a tree, pole or barrier in 34%, a pedestrian in 12%, a parked vehicle in 4.2%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 54 | 46% |
| Fixed object (tree, pole, barrier, ditch) | 40 | 34% |
| Pedestrian | 14 | 12% |
| Parked vehicle | 5 | 4.2% |
| Rollover | 4 | 3.4% |
| Other | 1 | 0.8% |
| 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-84 in Connecticut compare with the state
A drinking driver was recorded in 31% of fatal crashes in I-84 in Connecticut from 2015 to 2024, below the Connecticut share of 34%; speeding in 31%, below the Connecticut share of 33%; a hit-and-run in 2.5%, below the Connecticut share of 8.5%; 50% of passenger-vehicle occupants killed with belt use known were unbelted, about the Connecticut share. Shares of fatal crashes from 2015 to 2024, against the share across all of Connecticut. A share is only given over 20 crashes.
| I-84 | Connecticut | ||
|---|---|---|---|
| On rural stretches | 9.3% | 14% | below the Connecticut share |
| At or near an intersection | 2.5% | 23% | below the Connecticut share |
| In the dark, road unlit | 20% | 17% | above the Connecticut share |
| A drinking driver | 31% | 34% | below the Connecticut share |
| Speeding | 31% | 33% | below the Connecticut share |
| Occupants killed unbelted | 50% | 50% | about the same as the Connecticut share |
| Hit-and-run | 2.5% | 8.5% | below the Connecticut share |
| A motorcycle involved | 14% | 21% | below the Connecticut share |
| Pedestrians among the dead | 14% | 19% | below the Connecticut 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-84 in Connecticut
- How many fatal crashes have there been on I-84 in Connecticut?
- 118 fatal crashes killed 133 people on I-84 in Connecticut from 2015 to 2024. In 2024 there were 11 fatal crashes and 12 deaths.
- Where on I-84 in Connecticut do the most fatal crashes happen?
- Hartford County had the most fatal crashes on I-84 from 2015 to 2024: 65, with 75 deaths. New Haven County was second with 24.
- How dangerous is I-84 in Connecticut per mile?
- 12.05 fatal crashes a year per 100 miles over 2015 to 2024, on 98 miles of road, against 14.35 for all interstates in Connecticut. That ranks 3 of 3 interstates in Connecticut and 50 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 Connecticut with a page
All fatal crashes in Connecticut, with every road ranked.
Where the I-84 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as I-84 in Connecticut (filed under 4 spellings, such as "I-84", "I-84 E", "I-84-E-706", "I-84-W"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.