What is SIG Alert in California Freeways?

Question:
Warning for traffic condition

Answers:

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I live in cali and love sigalert.com you can see any issues on the road that have been reported and you can get details such as which emergency vehicles have been dispatched and are enroute
as well as which lanes the accident happened in. it lets me know if i need to look for an alternate route home so im not late for dinner.

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"Sig-Alerts" are unique to Southern California. They came about in the 1940s when the L.A.P.D. got in the habit of alerting a local radio reporter, Loyd Sigmon, of bad car wrecks on city streets. These notifications became known as "Sig-Alerts." Later Mr. Sigmon developed an electronic device that authorities could use to alert the media of disasters. Caltrans latched on to the term "Sig-Alert" and it has come to be known as any traffic incident that will tie up two or more lanes of a freeway for two or more hours.

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A Sig Alert is defined by the California Highway Patrol as "any unplanned event that causes the closing of one lane of traffic for 30 minutes or more, as opposed to a planned event like road construction, which is planned separately." Sig Alerts are issued by the CHP and are posted on their Web site, broadcast on radio and television stations throughout California, and signaled to motorists via electronic billboards on the freeways.

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SigAlerts originated in 1955 with the Los Angeles Police Department. Ironically, one of the first major Sig alerts, in January of 1956, caused a traffic jam. The alert described the derailment of the Santa Fe's San Diegan passenger train near LA's Union Station and requested any available doctors and nurses to respond to the scene. Too many doctors, nurses, and sightseers drove there, making the situation worse.

Rush hour?

In 1969, when the CHP assumed responsibility for freeway traffic from the LAPD, they took control of the SigAlert system as well. It is now used throughout California and limited to traffic situations only. Messages are still broadcast, but most radio stations now read the information from the CHP's Web service rather than rebroadcasting the police dispatchers' voices. Most radio stations just call them traffic alerts now.

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