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2. Citizens band radio - Wikipedia

   en.wikipedia.org/wiki/Citizens_band_radio

   After the 1973 oil crisis, the U.S. government imposed a nationwide 55 mph speed limit, and fuel shortages and rationing were widespread.Drivers (especially commercial truckers) used CB radios to locate service stations with better supplies of fuel, to notify other drivers of speed traps, and to organize blockades and convoys in a 1974 strike protesting the new speed limit and other trucking ...

3. Base station - Wikipedia

   en.wikipedia.org/wiki/Radio_base_station

   The base station is one end of a communications link. The other end is a movable vehicle-mounted radio or walkie-talkie. [6] Examples of base station uses in two-way radio include the dispatch of tow trucks and taxicabs. Basic base station elements used in a remote-controlled installation. Selective calling options such as CTCSS are optional.

4. CB radio in the United States - Wikipedia

   en.wikipedia.org/wiki/CB_radio_in_the_United_States

   Adjacent frequencies are often used by illegal operators using modified CB or amateur radio equipment. Operators sometimes refer to this activity as freebanding. The Industrial/Business Radio Pool of the Private Land Mobile Radio Services has several channels just above the Citizen's Band, at 27.430, 27.450, 27.470, 27.490, 27.510, and 27.530 MHz.

5. Remember CB Radios? They're Back - AOL

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6. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   Used for elevated base station antennas for land mobile radio systems such as police, ambulance, and taxi dispatchers. Mast radiator A radio tower in which the tower structure itself serves as the antenna. Common form of transmitting antenna for AM radio stations and other MF and LF transmitters.

7. Personal radio service - Wikipedia

   en.wikipedia.org/wiki/Personal_radio_service

   The 78 MHz CB allocation is primarily used by mobile and base stations, although handheld radios for 78 MHz are available. The lower frequency allows for longer communication range in rural and suburban areas compared to the 245 MHz service. 78 MHz is popular with trucking companies, buses, taxi companies and other transportation users, often ...