**THE-RFI-EMI-GUY** wrote:
GMRS is not legal for commercial useage. In fact the trucker would have
to have a license! There are some long range wireless intercoms made.
Check some home automation websites. They are for people with long
driveways and similar requirement.


FRS is the non-commercial one. GMRS is commercially licensable,
unless the FCC changed the rules again on me. GMRS and FRS do have some
frequencies in common, so they can talk to each other.
Of course, if the OP is not in the USA, then this doesn't apply.

--Dale