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A travelers' information station (TIS), also called highway advisory radio (HAR) by the United States Department of Transportation, is a licensed low-powered non-commercial radio station, used to broadcast information to the general public, including for motorists regarding travel, destinations of interest, and situations of imminent danger and emergencies.
REACT (Radio Emergency Associated Communication Teams) is a CB radio Emergency Channel 9 monitoring organizations across the United States, Canada and worldwide, established in 1962. The primary role of REACT volunteers was to stand and watch on CB Emergency Channel 9 to help motorists. Later, duties grew to include radio communications after ...
A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of people, watercraft ...
Traffic announcement (radio data systems) Traffic announcement (TA) refers to the broadcasting of a specific type of traffic report on the Radio Data System. It is generally used by motorists, to assist with route planning, and for the avoidance of traffic congestion. The RDS-enabled receiver can be set to pay special attention to this TA flag ...
The aircraft emergency frequency (also known in the USA as Guard) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress.The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD), International Aeronautical Emergency Frequency, [1] or VHF Guard, [1] and 243.0 MHz—the second harmonic of VHF guard—for military ...
In 18 minutes of 911 audio released recently by the Fayetteville Police Department of the car-to-car police radio traffic, an officer said an "investigative stop" was being made on a vehicle on ...