The deadliest roads in Connecticut
I-95 had the most fatal crashes of any numbered road in Connecticut from 2015 to 2024: 151, with 176 deaths. The 60 roads listed held 57% of all fatal crashes in Connecticut from 2015 to 2024; 5 are interstates, 6 US routes, 49 state highways.
230 numbered roads in Connecticut recorded a fatal crash in those years; the 60 with 5 or more are ranked below, and 10 have a page of their own. All fatal crashes in Connecticut.
Every numbered road in Connecticut, ranked by fatal crashes
| Road | Kind | Fatal crashes | Deaths | 2022 to 2024 | Counties with the most | |
|---|---|---|---|---|---|---|
| 1 | I-95 | Interstate | 151 | 176 | 48 | 1, 9, 11 |
| 2 | I-84 | Interstate | 118 | 133 | 41 | 3, 9, 1 |
| 3 | I-91 | Interstate | 115 | 128 | 43 | 9, 3, 7 |
| 4 | US 1 | US route | 91 | 93 | 33 | 1, 9, 11 |
| 5 | State Highway 8 | State highway | 87 | 97 | 29 | 1, 5, 9 |
| 6 | US 6 | US route | 86 | 94 | 30 | 15, 3, 13 |
| 7 | State Highway 15 | State highway | 71 | 78 | 20 | 9, 3, 1 |
| 8 | State Highway 10 | State highway | 64 | 65 | 21 | 9, 3 |
| 9 | US 44 | US route | 61 | 65 | 18 | 3, 5, 15 |
| 10 | US 7 | US route | 43 | 43 | 22 | 5, 1 |
| 11 | State Highway 2 | State highway | 35 | 35 | 9 | 3, 11 |
| 12 | I-395 | Interstate | 34 | 37 | 11 | 11, 15 |
| 13 | State Highway 9 | State highway | 33 | 37 | 10 | 7, 3 |
| 14 | State Highway 32 | State highway | 32 | 34 | 10 | 13, 11, 15 |
| 15 | State Highway 34 | State highway | 29 | 32 | 11 | 9, 1 |
| 16 | US 5 | US route | 29 | 30 | 13 | 3, 9 |
| 17 | State Highway 69 | State highway | 24 | 26 | 10 | 9, 3 |
| 18 | State Highway 63 | State highway | 22 | 23 | 7 | 9, 5 |
| 19 | State Highway 66 | State highway | 22 | 23 | 4 | 7, 13, 15 |
| 20 | US 202 | US route | 20 | 21 | 7 | 5 |
| 21 | State Highway 12 | State highway | 20 | 20 | 7 | 11, 15 |
| 22 | State Highway 80 | State highway | 19 | 21 | 5 | 9 |
| 23 | State Highway 17 | State highway | 18 | 19 | 7 | 7, 9, 3 |
| 24 | State Highway 72 | State highway | 17 | 18 | 7 | 3, 5 |
| 25 | State Highway 847 | State highway | 15 | 19 | 6 | 9 |
| 26 | State Highway 169 | State highway | 15 | 16 | 4 | 15, 11 |
| 27 | State Highway 4 | State highway | 14 | 16 | 4 | 5, 3 |
| 28 | State Highway 187 | State highway | 14 | 15 | 5 | 3 |
| 29 | State Highway 130 | State highway | 13 | 14 | 6 | 1 |
| 30 | State Highway 71 | State highway | 13 | 13 | 2 | 9, 3 |
| 31 | State Highway 25 | State highway | 12 | 12 | 6 | 1 |
| 32 | State Highway 229 | State highway | 11 | 12 | 4 | 3 |
| 33 | State Highway 20 | State highway | 11 | 11 | 3 | 3 |
| 34 | State Highway 85 | State highway | 11 | 11 | 5 | 11, 13 |
| 35 | State Highway 110 | State highway | 10 | 12 | 1 | 1 |
| 36 | State Highway 67 | State highway | 10 | 11 | 1 | 9, 5 |
| 37 | State Highway 68 | State highway | 10 | 11 | 2 | 9 |
| 38 | State Highway 83 | State highway | 10 | 11 | 3 | 13, 3 |
| 39 | I-691 | Interstate | 10 | 10 | 3 | 9, 3 |
| 40 | State Highway 3 | State highway | 10 | 10 | 3 | 3, 7 |
| 41 | State Highway 30 | State highway | 10 | 10 | 2 | 13, 3 |
| 42 | State Highway 37 | State highway | 10 | 10 | 2 | 1 |
| 43 | State Highway 800 | State highway | 10 | 10 | 2 | 5 |
| 44 | State Highway 16 | State highway | 9 | 11 | 2 | 11, 7 |
| 45 | State Highway 372 | State highway | 9 | 10 | 5 | 3, 7 |
| 46 | State Highway 190 | State highway | 8 | 9 | 3 | 13, 3 |
| 47 | State Highway 101 | State highway | 8 | 8 | 2 | 15 |
| 48 | State Highway 113 | State highway | 8 | 8 | 4 | 1 |
| 49 | State Highway 53 | State highway | 8 | 8 | 1 | 1 |
| 50 | State Highway 82 | State highway | 7 | 9 | 1 | 11, 7 |
| 51 | State Highway 99 | State highway | 7 | 9 | 3 | 3, 7 |
| 52 | State Highway 137 | State highway | 7 | 8 | 3 | 1 |
| 53 | State Highway 127 | State highway | 7 | 7 | 3 | 1 |
| 54 | State Highway 201 | State highway | 7 | 7 | 1 | 11 |
| 55 | State Highway 844 | State highway | 7 | 7 | 3 | 9 |
| 56 | State Highway 159 | State highway | 6 | 7 | 1 | 3 |
| 57 | State Highway 354 | State highway | 6 | 7 | 1 | 11 |
| 58 | State Highway 73 | State highway | 6 | 7 | 3 | 9 |
| 59 | State Highway 138 | State highway | 6 | 6 | 1 | 11 |
| 60 | State Highway 14 | State highway | 6 | 6 | 1 | 15 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Interstates in Connecticut per mile
Fatal crashes a year per 100 miles of road, 2015 to 2024, for interstates with 20 miles or more in Connecticut. Crashes per mile of road, not per vehicle. Mileage from the FHWA Interstate route log.
| Road | Per 100 miles a year | Fatal crashes | Miles | |
|---|---|---|---|---|
| 1 | I-91 | 19.77 | 115 | 58 |
| 2 | I-95 | 13.53 | 151 | 112 |
| 3 | I-84 | 12.05 | 118 | 98 |
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 Connecticut
- What is the deadliest road in Connecticut?
- I-95 had the most fatal crashes of any numbered road in Connecticut from 2015 to 2024: 151, with 176 deaths. I-84 was second with 118 and I-91 third with 115.
- Which interstate in Connecticut is the most dangerous per mile?
- I-91, with 19.77 fatal crashes a year per 100 miles over 2015 to 2024 on 58 miles. That is crashes per mile of road, not per vehicle.
- How many fatal crashes in Connecticut happen on numbered roads?
- 1,945 of 2,798 fatal crashes in Connecticut from 2015 to 2024 (70%) were filed on an interstate, US or state route; the rest were on county roads, city streets and unnamed roads, which are in the state's total but not ranked here.
Where the Connecticut road numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash filed on a numbered interstate, US or state route in Connecticut, read from the road name NHTSA filed, with ramps, frontage and service roads left out. A road gets its own page with 15 or more fatal crashes from 2022 to 2024. The full method.