Only suggstion and have investigated many many types of accidents over the years... The ones that were sliders have either the paint removed all the way to the metal at points..or seeing the majority of trhe interstates are made of concrete there would be a white powdery (not nose candy hehe)substance on the paint...

My opinion like some of the other posts might have been hit by a semi...look closely at the bed it appears to be wavy as if the weight of the cab made it as it was trying to go all the way over it.... As for the L mirror happens alot when vehicle is forced into those quite high new median barriers... John from NC