Augusta PD went to UHF at about the same time with two channels. 100% Motorola as far as I know. The audio quality was never as good as the Richmond Co. system. Much later, some APD supervisors and detectives also had very nice VHF mobiles, Motorola Micor of course. The VHF radios were very rarely used. Interesting note: the VHF radios had red mics as opposed the usual white ones, apparently to differentiate the two radios.
There was zero operability between Richmond Co. SO and Augusta PD until the middle 1990's. The city purchased an AVL system from Motorola which never worked properly. As I understand it, they gave the AVL system back to Motorola in exchange for a bunch of high-end portables that were also programmed with the RCSO channels.
The traffic guys on motors were not issued portables. The rationalization was that in the event of an accident or fall, the portable could be damaged.