Massachusetts State Police investigate Quincy I-93 crash that killed one person and seriously injured another

Crash occurred early Sunday on southbound I-93

Massachusetts State Police are investigating a fatal single-vehicle crash on Interstate 93 in Quincy that left one person dead and a second person seriously injured, authorities said.

Troopers responded at about 6:05 a.m. Sunday, March 8, 2026, and located two people connected to the crash. One of them died from injuries sustained in the incident, while the other was transported with serious injuries. The victim’s name had not been released as of Sunday.

Traffic impacts and agency response

The right travel lane was closed during the on-scene response and investigation. The Office of the Chief Medical Examiner and the Massachusetts Department of Transportation were notified and responded, state police said. The roadway was cleared and all lanes reopened at 8:52 a.m.

Officials did not immediately provide details on the vehicle involved, the exact location along the Quincy stretch of I-93, or whether the crash occurred on the mainline highway or a ramp.

What investigators typically examine in a fatal highway crash

State police have not released a cause. In fatal single-vehicle cases, investigators commonly work to reconstruct the timeline and identify factors that may have contributed to the crash, including roadway conditions, potential mechanical failure, and driver behavior. That process can include scene measurements, vehicle examinations, and reviews of medical examiner findings.

Because the incident remains under investigation, it was not clear Sunday whether any enforcement action would follow or whether investigators have ruled out contributing factors such as impairment, speed, distraction, or a medical emergency.

• Time of response: about 6:05 a.m., Sunday, March 8, 2026
• Type of crash described by police: single-vehicle
• Outcome: one person dead; one person seriously injured
• Traffic impacts: right travel lane closed; all lanes reopened at 8:52 a.m.

What’s next

Authorities have not released additional information about the circumstances of the crash or the identities of those involved. Further details are expected after investigators complete next-of-kin notifications and confirm findings from the crash reconstruction and medical examiner review.

Anyone who witnessed the crash or may have relevant information is typically asked to contact investigators as the reconstruction proceeds.