Two separate, overturned-vehicle crashes on the Interstate 5 in Castaic caused hours of heavy traffic Friday afternoon. The first incident was reported around 12:30 p.m. northbound on the I-5, south of Parker Road. California Highway Patrol officer Eric Priessman said the CHP and firefighters responded to a report of a silver SUV turned on its side. The number of total occupants is unknown, but one person was transported to a nearby hospital, a spokesperson with the Los Angeles County Fire Department said Friday. As a result, three out of four lanes remained closed well after 1 p.m. A second solo-vehicle rollover, involving a black Toyota, took place at 1 p.m. southbound on the I-5, near Hasley Canyon Road. Priessman said the collision happened on the off-ramp, with the car hitting the impact attenuators. The CHP report said a woman crawled out of the vehicle with no injuries. No others were reported to have been affected as a result. Traffic was reported to have backed up as far as to Magic Mountain Parkway in Valencia, more than five miles south of both accidents. All lanes closed as a result of the Parker incident reopened shortly after 2 p.m. but traffic continued to be heavy northbound on the I-5, near Magic Mountain, as of 2:30 p.m.