Four of five public transit millage proposals in Michigan passed yesterday. In Cadillac/Wexford County millage was easily renewed, as it was in Bay City. In Genesee County an additional millage for MTA operations narrowly was approved while in Spring Lake Township in Ottawa County a new millage for expansion for Harbor Transit easily was approved. Only a new millage in Addison Township of Oakland County, for North Oakland Transportation Authority operations, failed by a narrow margin.