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 230 numbered roads 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. I-84 in every state.
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 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 on 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
117 fatal crashes on I-84 in Connecticut from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. The worst hour is 1 am to 2 am; 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 | 6.0 percent, 7 fatal crashes | 0.9 percent, 1 fatal crash | 0.9 percent, 1 fatal crash | 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 crash | 1.7 percent, 2 fatal crashes | 2.6 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Tue | 0.9 percent, 1 fatal crash | 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 crash | 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 crash | 0.9 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 0.9 percent, 1 fatal crash | 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 crash | 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
12.1 fatal crashes a year per 100 miles over 2015 to 2024, on 98 miles of I-84 in Connecticut, against 14.3 for all interstates in Connecticut. That ranks 3 of 3 interstates in Connecticut and 49 of 172 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
The largest difference from Connecticut: from 2015 to 2024, 2.5% of fatal crashes on I-84 in Connecticut were at or near an intersection, against 23% across Connecticut. Below the Connecticut share: hit-and-runs and motorcycles. Shares of fatal crashes from 2015 to 2024, against the share across all of Connecticut. A share is only given over 20 crashes; above or below means more than chance would give on 118 crashes.
| I-84 | Connecticut | ||
|---|---|---|---|
| On rural stretches | 9.3% | 14% | about the same as the Connecticut share |
| At or near an intersection | 2.5% | 23% | below the Connecticut share |
| In the dark, road unlit | 20% | 17% | about the same as the Connecticut share |
| A drinking driver | 31% | 34% | about the same as the Connecticut share |
| Speeding | 31% | 33% | about the same as the Connecticut share |
| A distracted driver (as recorded) | 3.4% | 3.4% | about the same as 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% | about the same as 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 on 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. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- 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?
- 12.1 fatal crashes a year per 100 miles over 2015 to 2024, on 98 miles of road, against 14.3 for all interstates in Connecticut. That ranks 3 of 3 interstates in Connecticut and 49 of 172 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. Where two routes share a road, NHTSA files each crash under one of them, so a shared stretch counts on one route only. A fatal crash is one in which someone died within 30 days. Totals in state and news reports for a road usually differ: they include ramps and frontage roads, or count from preliminary reports. The full method.