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1. Sigalert Aircheck Demo
Metro Traffic's new
2. Ever wondered what the 'Sig' in Sigalert stands for
You've all received Sigalerts before. Ever wondered what the 'Sig' stands for? NBC 7's Mark Mullen has the answer.
3. SigAlert issued on 101 Freeway in downtown LA
Traffic was stopped on both sides of the
4. Body found in tent near 60 FWY prompts Sigalert
5. Pedestrian fatally struck by vehicle on I-10 Freeway; Sigalert issued
An investigation continued through Tuesday morning after a pedestrian was found dead on the I-10 Freeway after being struck by ...
6. Overturned semi spills cinder blocks across NB 101; SigAlert issued
An early morning crash involving a big rig scattered cinder blocks across the northbound
7. Police Activity Snarls Traffic On 405 Freeway In Inglewood
8. CHP Involved Three-Vehicle Crash on 101E Causes Sig Alert
3.12.2019 | 10:18pm | 101E / Winnetka - A three vehicle crash has caused a
9. Flooding closes portion of 101 Freeway through downtown L.A.
10. Deadly motorcycle crash causes SigAlert on 101 Freeway
The crash happened early Saturday afternoon, causing multiple lanes of the freeway to shut down for several hours.
11. Sigalert issued in Van Nuys after pedestrian fatally struck on 405 Freeway
A lengthy
12. Overturned Truck Triggers Sigalert On 405 In Gardena
Crews are cleaning up a big mess that was caused by an overturned big rig.
13. SigAlert Issued For Chickens On 5 Freeway
The backup on the southbound 5 at the 2 Freeway had Stephanie Simmons squawking.
14. SigAlert issued for 405 Freeway after pedestrian killed while running across lanes
CHP officials issued the
15. At least one car submerged as heavy flooding fills Hollywood streets; 6-hour Sigalert issued
Kara Finnstrom reports from Hollywood where a burst water main flooded the Cahuenga Boulevard area, submerging one vehicle ...
Sigalert 101 Information Guide
Background on Sigalert 101
Important Facts
History
Deep Dive
Data is compiled from public records and verified media reports.
Last Updated: August 11, 2026
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Disclaimer: Disclaimer: All information is compiled from publicly available data, media reports, and analysis. Actual details may vary.