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Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with lights only (rarely allowable by state statutes) Code 1: Respond to the call without lights or sirens. Some agencies may use the terms "upgrade" and "downgrade" to denote an increase or decrease in priority.
A police radio code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include " 10 codes " (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes , or ...
The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [ 1 ] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.
Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its ...
A civil danger warning (SAME code: CDW) is a warning issued through the Emergency Alert System (EAS) in the United States to warn the public of an event that presents danger to a significant civilian population. It is typically issued by a local or state authority and is relayed by the National Weather Service. The warning usually mentions a ...
A law enforcement warning (SAME code: LEW) is a warning issued through the Emergency Alert System (EAS) in the United States to warn the public of criminal, and sometimes hazardous weather events that pose a threat to public safety.
The California Highway Patrol (CHP) is the principal state police agency for the U.S. state of California. The CHP has primary jurisdiction, including patrol and investigations, over all California freeways and state property [5]. Additionally, the CHP is responsible for the enforcement of all laws regulating the operation of vehicles on ...
Atmospheric ash plume advisories/warnings are also issued by the United States Geological Survey (Aviation Color Codes). Airport weather warning AWW – Addresses weather phenomena (including but not limited to surface wind gusts around or above 40 knots (46 mph), freezing rain, heavy snow or thunderstorms producing cloud-to-ground lightning ...