At 14:22 hrs. during rig move operations, one of the trailers carrying rig floor substructure rolled over (90⁰) on the graded road between the old and new rig sites. Total distance between both rig sites is 4.5 km, during travelling the driver was maneuvering the vehicle to avoid pot holes on the road. After 1.7km from the old location the driver drove on the road left shoulder which was uneven and caused the truck to tip over due to high center of gravity.