Commuters see delays of up to two hours on Thursday morning.
A car caught fire in the northbound lane of Route 93 on Thursday, causing massive delays during the morning commute.
A sedan burst into flames just after the Exit 6 ramp in Braintree just before 7 a.m., after it was rear-ended by another car when the driver had a medical episode, Braintree Fire Chief James O'Brien said.
Neither of the drivers was injured, but the with the medical condition was taken to South Shore Hospital for evaluation.
The car caught fire after the collision forced it into a guardrail, O'Brien said.
State Police closed all northbound lanes of traffic on Route 93 so they could clear the highway of debris.
Commuters headed into Boston experienced delays of up to two hours as traffic was detoured off of the highway.
Police re-opened all lanes of traffic at 7:45 a.m.