LAKE ELSINORE (CNS) - A big rig driver was freed from the wreckage of a rollover crash on southbound Interstate 15 this morning and hospitalized with serious injuries. The accident occurred near Railroad Canyon Road about 1:30 a.m., according to the Riverside County Fire Department. The driver was trapped in the truck and rescued by firefighters, then taken to a hospital with serious injuries, the department said. The crash caused gravel being hauled by the truck to be dumped on the freeway, prompting the closure of the No. 1 lane of the freeway until further notice. Details of what caused the crash were not immediately available.