Police are investigating a fatal crash that occurred shortly after 3 a.m. on Sunday morning.
According to police, Samantha Beauduy, 25, of Holbrook was driving a 2009 BMW south on Route 37 when at some point she crossed into the northbound lane of travel.
Police said the car ultimately collided head on with an iron barrier that is at the edge of a sidewalk and spans the length of the commuter rail bridge on the route.
Beauduy was extricated from the vehicle by Braintree Fire and transported to South Shore Hospital by Fallon Ambulance.
Police said the victim was pronounced dead at the hospital.
Braintree’s Traffic Division is investigating the crash.