Is PMR 446MHz the replacement for CB Radio...I dont think so BUT what is it??
PMR Radio is a Service introduced in 1999 that allows us to
enjoy a free radio service using small compact handheld
radio's. It is available to small businesses and private users
alike on a set of harmonised european channels.
Unlike 4w CB power these handhelds are restricted to 500mw (1/2 W)
ERP With a fixed aerial and cannot be used in conjunction
with a Base aerial. It is intended for short range only. No licence is required.

The 8 Frequencys are;

MHz          446.01875MHz        446.03125MHz          446.04375MHz

446.05625MHz          446.06875MHz          446.08125MHz         446.09375MHz

When these frequencies are used in combination with a number of CTCSS or
DCS tone codes, they can provide many channel combinations. Basically there are 38 sub
channels on each of the 8 frequencies making a total of 304 channels.

Distance wise they can go from a few hundred yards  in heavily built up areas to around 10
miles depending on the radio/terrain and  in favorable conditions ie, high up with no obstructions.
The Best Long Range known record is 535.8Km (333m) From Blyth (UK) to Almere (NL)
Click to view some PMR 446 Handheld Radio's