Company 3 was dispatched to the 36.7 SB of Interstate 81 for a traffic accident.  The scene was found to be at the 200 block of Tattle Branch Road.  A single vehicle traveled from I-81 to an underpass below, striking an embankment and landing on guardrail between two bridges. Assisted by Smyth County Public Safety, CPD Officers and SCSDs, the driver was extricated by removing the driver’s seat, opening the back hatch with hydraulic tools and then transported to a trauma center.