I have been told, back in the good ol' days, that 460.025R was F-3 on the old State Police channel setup. As it was explained to me, all of the troop channels used to be simplex base-mobile. These repeaters were available to all law enforcement to extend communications if they were out of range of their troop channel or local channel. Each repeater used to use 118.8 so the user would have to dial a DTMF code to access the appropriate repeater, then when they were done would have to dial it off. A lot of Sheriff's Departments use to use it, especially if they either didn't have their own channel or were doing a long distance prisoner transport. But, after the VSP started going to specific frequencies for each station (instead of troop) 460.025 was re-assigned for station assignment. St. Albans and one other use 460.025 MHz. for their day-to-day operations.
Also, along those lines, 460.150 - as it was explained to me - was F-5 Town to Town Net, for local town police to inter-agency with each other. I didn't ever hear any activity on that channel except for St. Albans City PD using it as 'RED-5' which was a private channel for use using an analog scrambler. Again, after radio system changes, 460.150 is now used by Derby and Rutland for day-to-day operations.
460.275 was F-4, for State Police units to contact Headquarters statewide or for troopers who were out of troop to be able to reach the troop they were currently located in. Middlebury now uses 460.275 for day-to-day operations.
460.500 is F-2, car to car statewide for all law enforcement in the state. Simplex. Has been, and probably will always be. The 'original' Vermont law enforcement inter-op.
