Citizens Band Radios, or CB for short, is a convenient, two-way, public radio service that truck campers (TCs) can use when traveling together (such as in a caravan) or when passing other TCs traveling in the opposite direction. Because of the CB radio’s limited signal range, conversations are usually brief when inquiring about weather, traffic, road conditions, accidents, possible detour routes, etc.
You do not need a license to use a CB radio. However, TCers must abide by certain regulations. For example, the user must always give priority to emergency communication messages regarding immediate life-safety situations and refrain from using that channel until the emergency has ended. Although you can use any channel for conversation,
channel 9 
is reserved for emergencies or asking for traveler assistance. And channel 11 
is for calling other CBers.
Channel 19 is the trucker’s channel in most areas of the country.
What is the range of a CB radio? What can you expect for the CB radio distance? Those are excellent questions, and considering various variables, they are challenging to answer. Generally, CB radios have a range of 4-7 miles vehicle-to-vehicle, depending on the model, antenna, and other factors that may affect range. For example, the antenna quality generally determines the CB radio’s average range.
Standard features in many consumer CB radios include access to National Oceanic and Atmospheric Administration (NOAA) weather channels and weather alerts.
There are seven radio frequencies designated specifically for NOAA weather broadcasts. These frequencies are used by a network of transmitters across the US to broadcast weather information, warnings, and alerts 24 hours a day, 7 days a week, 365 days a year.