Oceanside CA- A double fatal accident shut down northbound Interstate 5, this morning. A Sig-Alert was issued at 9:22AM for northbound I-5, just south of the truck scales near Camp Pendleton. An Oceanside woman and her 4 year old daughter were killed when their SUV rear-ended a tractor-trailer that was waiting in line for the truck scales. All lanes where closed for landing of a lifeflight and investigation of the accident. Several lanes were re-opened by 10:30 and all were open by 2:15PM according to the CHP.