Media Summary: You've all received Sigalerts before. Ever wondered what the 'Sig' stands for? NBC 7's Mark Mullen has the answer. Sky9 was over the scene of a multi-vehicle collision that occurred last Sunday evening, which prompted a full Crews are cleaning up a big mess that was caused by an overturned big rig.
Sigalert Closure Issued For Highway - Detailed Analysis & Overview
You've all received Sigalerts before. Ever wondered what the 'Sig' stands for? NBC 7's Mark Mullen has the answer. Sky9 was over the scene of a multi-vehicle collision that occurred last Sunday evening, which prompted a full Crews are cleaning up a big mess that was caused by an overturned big rig. Officials said two people were killed in the morning crash. Subscribe to FOX 11 Los Angeles: ... Firefighters battling wildfire off Interstate 5, north of Castaic.
