Transcript for Hero State Trooper's Fiery Rescue
It is truly Green how big. Hair that we got seconds after the explosions the truck burst into flames at. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- It happened at about 6 AM on fall river's -- -- -- State police say the driver of the trailer truck 42 year old Luis Cotto was heading southbound on route 79 when he lost control of his race. Veered off to the -- ripped out a section of the guard -- before crashing into a support -- Quick thinking trooper Alison Powell safe -- -- life. -- Powell. A -- vehicle be fully engulfed in flames the operators outside the vehicle slumped over the Jersey -- -- dragged him away from the scene. And -- fire at that time. It was very shocking. Shocking. Very shocking. Act still it -- me that he's alive the driver now hospitalized with serious injuries. -- -- heat from the fire caused major structural damage to the bridge. State police shut down sections of route 79 in both directions while DOT students began their hands most of the -- -- Was the supports. From the southbound debt up to the underside of the northbound -- you can see crews are already. Shaking head way to guard -- has been replaced DOT says. It has message board sat up to let people know alternate routes to get around this detour. Seventy ninth -- -- will remain closed until later this evening or tomorrow morning. As for the northbound side that'll remain closed for most of the week in Fall River I'm Cheryl in -- news center fox.
This transcript has been automatically generated and may not be 100% accurate.