[Full] RAW Highway surveillance video 18-wheeler flies off highway on to road below

18-wheeler crashes through I-30 guardrail, falls to highway below 18-wheeler flies off highway on to road below WATCH: Highway surveillance video shows the moment when an 18-wheeler crashes through Texas turnpike's guardrail and falls to the highway below GRAND PRAIRIE, TX (KLTV) - Authorities are still investigating a fiery 18-wheeler crash in Grand Prairie. According to WFAA, surveillance cameras were rolling Saturday when an 18-wheeler crashed through the guardrails on Interstate 30 and plunged onto the President George Bush Turnpike below. The North Texas Tollway Authority released the video that shows the semi smashing into the northbound and southbound lanes of the turnpike, narrowly missing other motorists. The vehicles slam on their brakes to avoid the wreckage as all traffic comes to a halt. Several motorists get out of their cars and run towards the fiery crash to help, but there is little they could do. The semi's driver, 59-year-old James Anthony Long of Clarksville, TN, was killed in the crash. The cause of his death remains under investigation. It is not clear why the truck left the highway. The 18-wheeler truck rammed through the guardrail on an interstate overpass near Dallas on Saturday Truck driver James Anthony Long, 59, was the only fatality A video has emerged showing the harrowing moment when an 18-wheeler crashed on a major interstate outside of Dallas, Texas causing a massive explosion and killing the driver. The security footage on Interstate 30 caught the explosive moment that the truck flew off an overpass and crashed on the busy freeway below. There were a handful of cars driving along the President George Bush Turnpike on Saturday afternoon when the 18-wheeler crashed but they were able to slow down and swerve out of the way in order to avoid hitting the fiery truck. WATCH THE VIDEO HERE Flying: The 18-wheeler rammed through the guardrail on the overpass and went into a freefall on Texas's I-30 Flying: The 18-wheeler rammed through the guardrail on the overpass and went into a freefall on Texas's I-30 Plummeting: The truck crashed in between the north and southbound lanes of the President George Bush Turnpike and then slid over further Plummeting: The truck crashed in between the north and southbound lanes of the President George Bush Turnpike and then slid over further 18-wheeler flies off highway on to road below The only reported fatality was the driver of the 18-wheeler, who has been identified as 59-year-old James Anthony Long of Clarksville, Tennessee. Local station KLTV reports that his exact cause of death is still unknown but an investigation into the what caused the truck to drive off the overpass is still underway. More... 'They're about to beat this boy to death!': Bus driver heard pleading on CCTV for help as 13-year-old is brutally beaten by older teens on way to school Hot air balloon carrying American family crashes in Switzerland killing father, 55, and seriously injuring mother and two daughters The truck was transporting ceramic tile, and is owned by a Gallatin, Tennessee-based company called B&M Trucking. The surveillance footage shows that a number of drivers who saw the truck crash pulled over and rushed towards the vehicle to see if they could help. Stopping suddenly: The 18-wheeler intersected all of the lanes of the turnpike causing quick stops from fellow drivers Stopping suddenly: The 18-wheeler intersected all of the lanes of the turnpike causing quick stops from fellow drivers Explosion: The reason for the crash is still being investigated and so is the actual cause of death of the driver Explosion: The reason for the crash is still being investigated and so is the actual cause of death of the driver The entire truck was engulfed in flames at that point, however, so there was no chance to save Mr Long from the wreckage. That said, one passenger vehicle was seen swerving towards the closest exit as the explosion began but the driver cut it so close that they nearly got in an accident themselves. Both the north and southbound lanes of the busy turnpike for the rest of Saturday evening as they stopped the fire and cleared the crash site. All lanes of the turnpike were reopened on Sunday morning.