This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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I, the creator of this image, hereby release it into the public domain. If that cannot be done for any reason including bureaucratic garbage, I release it under the following license:
This image is copyrighted. The copyright holder has irrevocably released all rights to it, allowing it to be freely reproduced, distributed, transmitted, used, modified, built upon, or otherwise exploited in any way by anyone for any purpose, commercial or non-commercial, with or without attribution of the author.
24 in by 25 in (600 mm by 635 mm) California State Route shield, made to the specifications of the 1971 Caltrans sign drawing (still in use). Uses the Roadgeek 2005 fonts. (United States law does not permit the copyrighting of typeface designs, and the fonts are meant to be copies of a U.S. Government-produced work anyway.) Colors are from [1] (Pantone Green 342), converted to RGB by [2]. The outside border has a width of 1 (1/16 in) and a color of black so it shows up; in reality, signs have no outside border.
Southern California Downtown Los Angeles Skyline Southern California, sometimes abbreviated SoCal or colloquially, the Southland, is an informal name for the megalopolis and nearby desert that occupies the southern-most quarter of the state of California. ... Southern California freeways The Golden State Freeway is a north-south freeway running through Kern County and Los Angeles County, California. ... JUNCTION POSTMILE CA-99 KER 0. ...