Trunking systems are great for high volume traffic and to help keep things organized in densely populated area. Another benefit of trunking systems is to allow interagency communication over a set area. This is why most public safety systems are established at the county or regional level. Yes, of course there are statewide ones and even multi-state ones, but traffic is localized and not that intense. "Long-Haul" communication via a trunking system doesn't make sense from an economic standpoint when there is already a great infra-structure already in place, public telephone. Feds of course have access to sat. comm. and probably other things. In any case to answer your question, yes the Feds (both Military and Civilian) use trunking systems, but just like everyone else. At a air base or army post or in a city or region. The frequencies lsited on the Wiki are accurate, but remember, you may not hear anything there for a long time. I have a Wildlife preserve just north of me and they talk on thier radio maybe 1 or 2 times a week!
