An early morning rush-hour accident has prompted the closure of all southbound lanes of the 5 Freeway in the Santa Clarita Valley this morning. At about 5 a.m., a big rig traveling southbound jackknifed near Calgrove Boulevard, blocking lanes and impacting one of two routes out of the valley. At 7:47 a.m., the city of Santa Clarita sent a text message alert to residents saying lanes were still closed until further notice. That means to travel to the San Fernando Valley will mainly come via the 14 Freeway and The Old Road.
