Citizens Band Radios, or CB for short, is a convenient public, two-way personal radio service communications that truck camper (TC) can use when traveling together (such as in a caravan) or when passing other TCs going the other direction. Because of the CB radio’s limited signal range, a conversation is 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.
You can use any channel for conversation. However, there are designated channels – channel 9 is reserved for emergencies or asking for traveler assistance, and channel 11 is for calling other CBers.
Most conversations on the Interstates are on channel 19 – the trucker’s channel.
Standard features in many makes and models of consumer CB radios have access to National Oceanic and Atmospheric Administration (NOAA) weather channels and weather alerts.
More information can be found on
https://northeast-truckcampers.org/truckcampers-and-citizen-band-radio/