Traffic resumed as normal on Route 3 in Braintree at about 2 p.m. this afternoon after a rollover accident near Exit 17.
The Massachusetts Department of Transportation reported on Twitter that all southbound lanes are now open.
Shortly after 1 p.m., at least one vehicle got into an accident prior to the Union Street exit. Braintree firefighters, state police and the MassDOT responded to the accident.
Will update as more information becomes available.