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Beyond the Traffic Jam: Everything You Need to Know About the Sigalert and How It Works
"A Sigalert is an official emergency alert issued by traffic authorities, historically originating with the California Highway Patrol (CHP), to notify the public of any unplanned event causing the closure of multiple traffic lanes for 30 minutes or more. Today, the term has evolved from its radio-broadcast roots into a comprehensive real-time traffic data ecosystem that helps commuters navigate severe urban gridlock. The Origins and Definition of the Sigalert To truly understand what a Sigalert is, one must look back at its origins in Southern California during the mid-20th century. Named after Loyd C. Sigmon, an executive at Golden West Broad..."
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