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A police 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 other ...
The development of the APCO Ten Signals began in 1937 [5] to reduce use of speech on the radio at a time when police radio channels were limited. Credit for inventing the codes goes to Charles "Charlie" Hopper, communications director for the Illinois State Police , District 10 in Pesotum, Illinois .
This type started in the mid-1970s. Used on town/city government vehicles, including police cars and dump trucks. The letters in the serial indicate the municipality. Municipal – Preserve the Sound Uses a "MUNICIPAL CT" sticker in place of validation sticker. 1·AB 12·AB 123·AB 1·ABC 12·ABC 123·ABC: Letters signify municipality. New York ...
In 1997 the Connecticut State Police was at the center of Connecticut Governor John G. Rowland’s Geargate scandal [7] Surplus military equipment intended for the State Police was diverted by Rowland and close associates for their personal use. Equipment and apparel including sleeping bags, camouflage jackets, helmets, and a bayonet made their ...
Traffic Message Channel (TMC) is a technology for delivering traffic and travel information to motor vehicle drivers.It is digitally coded using the ALERT C or TPEG protocol into Radio Data System (RDS) [1] carried via conventional FM radio broadcasts.
The first police radio systems were implemented in Detroit in 1928, when the Detroit Police Department set up a one-way radio system to broadcast crime information to police cars. [2] The frequency was assigned the call sign "KOP" by the Federal Communications Commission .
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In 1947, the system was tested by the Connecticut State Police in Glastonbury, Connecticut, initially for traffic surveys and issuing warnings to drivers for excessive speed. Starting in February 1949, the state police began to issue speeding tickets based on the speed recorded by the radar device. [ 5 ]