Most of those towns and cities have existing Transit Authorities.

Merging them under a single umbrella, statewide so that they had a uniform budget, uniform standards, a uniform fleet of vehicles (and just like toilet paper, if you buy busses in bulk, each one is cheaper than if you buy them one at a time). Apportion the state money available based on both population, and level of service. Let those various towns then pour some of their own money in to the LOCAL system if they choose.

Service literally everywhere would improve.