Media Summary: January 7, 2026 8:37 p.m. Black Mountain Road & Mira Mesa Boulevard On 3/12/24 at approximately 9:09 PM, Harbor PD and You've all received Sigalerts before. Ever wondered what the 'Sig' stands for? NBC 7's Mark Mullen has the answer.
San Diego Sigalert Accident Causing Major Traffic Nightmare - Detailed Analysis & Overview
January 7, 2026 8:37 p.m. Black Mountain Road & Mira Mesa Boulevard On 3/12/24 at approximately 9:09 PM, Harbor PD and You've all received Sigalerts before. Ever wondered what the 'Sig' stands for? NBC 7's Mark Mullen has the answer. Improvements are on the way for 15th and F Street following a Sky9 was over the scene of a multi-vehicle collision that occurred last Sunday evening, which prompted a full closure of the ...
