UPDATE: 9:06 a.m.
An early morning accident at the southbound I-5 and Hwy 210 caused major traffic problems for Santa Clarita commuters all morning.
The accident involved a motorcyclist, and prompted the California Highway Patrol to issue a SigAlert just after 6:00 a.m.
While the SigAlert was lifted before 7:30, the traffic damage was done. Cars on the southbound I-5 were backed up for miles and Hwy 14 saw severe traffic as far north as Sand Canyon Rd.