![]() At the time, the device cost about $600 (equivalent to $5,600 in 2018). When the receiver picked up a particular tone, it would record the subsequent bulletin. Sigmon developed a specialized radio receiver and reel-to-reel tape recorder. Now, he proposed to apply his knowledge of complex radio networks to the situation in Los Angeles. Eisenhower's staff, in charge of non-combat radio communications in the European theater. Sigmon had worked for Golden West's station KMPC 710 in 1941 but found himself in the United States Army Signal Corps during World War II, assigned to General Dwight D. Sigmon was executive vice president of Golden West Broadcasters (a company owned by singing cowboy Gene Autry). "Sig" Sigmon began developing a solution. Using the telephone to distribute the information tied up telephone lines and forced officers to repeat the same information again and again. Radio stations reported traffic conditions, but the LAPD refused to call radio stations with this information, so each station would call the LAPD. By the early 1950s, the rapidly growing number of automobiles in Los Angeles had greatly increased the frequency and severity of traffic accidents and jams. SigAlerts originated in 1955 with the Los Angeles Police Department (LAPD). ![]() In practice, there is no standard spelling the CHP website uses "SIG Alerts" and "Sigalert" while Caltrans uses "Sig-Alert". The term was added in 1993 to the New Shorter Oxford English Dictionary. The California Department of Transportation (Caltrans) defines it as any traffic incident that will tie up two or more lanes of a freeway for two or more hours. In practice, the term refers to a notice of such a closure issued by the CHP, and Sigalerts are posted on the CHP website, broadcast on radio and television stations throughout California, and signaled to motorists via electronic message signs on the freeways. The term was originally the name of a pioneering system of automated radio broadcasts regarding traffic conditions, introduced in the 1950s and named after its inventor, Loyd Sigmon.Ī Sigalert is defined by the California Highway Patrol (CHP) as "any unplanned event that causes the closing of one lane of traffic for 30 minutes or more". When you aren’t enjoying watching the Crane Cam you can report any potential sightings of the rare birds to TPWD’s Whooper Watch - a citizen-science-based reporting system that tracks whooping crane migration and wintering locations throughout Texas.Ĭopyright 2023 by KSAT - All rights reserved.Sig alert, Sig-alert or Sigalert in California, as well as other parts of the United States, means an incident that significantly disrupts road traffic. The efforts of the San Antonio Zoo to bring back the whooping crane from extinction were featured in “ Escape from Extinction,” a conservation documentary narrated by Academy Award Winner Helen Mirren. ![]() It is illegal to disturb the federally protected whooping cranes, and while they tend to seek out wetlands and agricultural fields, they also pass through large urban centers like Dallas-Fort Worth, Waco and Austin on their way to the Texas coast. Whooping cranes make an annual 2,500-mile migration from Alberta’s Wood Buffalo National Park in Canada to the coastal marshes of Texas. January 2023 estimates indicated 536 whooping cranes were seen at the wildlife refuge along the Texas coast. ![]() Of those, 43 were documented at Aransas National Wildlife Refuge and seven were in captivity. When the bird was listed under the Endangered Species Act in 1967, only 50 of the birds existed, USFWS officials said. Though the whooping crane population has been steadily increasing, the birds are still faced with habitat loss and overhunting. Whooping cranes have been documented to live more than 30 years in the wild, according to the U.S. The video stream is part of a collection of 24-hour KSAT live streams that also include views of other zoo enclosures, the San Antonio International Airport, the Bexar County Courthouse, the city skyline and more.
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