Tractor-trailer struck guardrail then over turned on to driver’s side, blocking both southbound lanes of traffic. Driver self-extricated and was transported to ED. Units cleared after one lane of traffic was opened.  Units later returned for a fire. Upon arrival, found a shipping container on a trailer with burning contents (computers). Access holes were cut and the fire was extinguished. Assisted with off-loading the contents. The cause of the fire was heat of friction from the container being dragger over asphalt. No injuries reported.