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State Route 66
Fatal crashes 2015–2024 21Deaths 22Counties 4Latest 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 21 fatal crashes on State Route 66 in Connecticut, with 22 deaths.
That is 0.8% of the 2,798 fatal crashes in Connecticut over the same years. The ten-year crash count fell 40% from 35 in 2005–2014 to 21 in 2015–2024.
The crashes were concentrated in Middlesex County (12), Tolland County (5) and Windham County (3) and 1 other county.
28.6% of the crashes had a driver reported as drinking (Connecticut: 34.3%) and 23.8% had a speeding-related driver (33.3%); pedestrians were 9.1% and motorcyclists 36.4% 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 Connecticut
| Measure | State Route 66 | Connecticut |
|---|---|---|
| Fatal crashes, 2015–2024 | 21 | 2,798 |
| Deaths, 2015–2024 | 22 | 2,983 |
| Deaths per fatal crash | 1.0 | 1.1 |
| Share of state fatal crashes | 0.8% | 100% |
| Change vs previous ten years | -40% | +9% |
Factor shares
Counties along the route
| # | County | Fatal crashes on SR-66 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Middlesex County | 12 | 57% | 140 |
| 2 | Tolland County | 5 | 24% | 136 |
| 3 | Windham County | 3 | 14% | 150 |
| 4 | Hartford County | 1 | 5% | 673 |
Hour of day
Share of fatal crashes on State Route 66 beginning in each hour, 2015–2024; tick marks the Connecticut share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 5–10 | 6 | 29% |
| Mile 25–30 | 4 | 19% |
| Mile 10–15 | 3 | 14% |
| Mile 35–40 | 3 | 14% |
| Mile 15–20 | 2 | 10% |
| Mile 20–25 | 2 | 10% |
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 Connecticut
- Interstate 95 155
- Interstate 91 119
- Interstate 84 118
- US Route 1 90
- State Route 8 87
- US Route 6 86
- State Route 15 76
- State Route 10 64
- US Route 44 60
- US Route 7 41
- State Route 2 36
- Interstate 395 34
All routes and counties in Connecticut
Questions and answers
How many fatal crashes have there been on State Route 66 in Connecticut?
21 fatal crashes with 22 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 State Route 66 had the most fatal crashes?
Middlesex County (12), Tolland County (5), Windham County (3) and Hartford County (1).
What share of crashes on State Route 66 involved alcohol or speeding?
28.6% had a driver reported as drinking and 23.8% a speeding-related driver, against 34.3% and 33.3% for all fatal crashes in Connecticut.
When do fatal crashes happen on State Route 66?
50.0% 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.