I feel like I am missing something with understanding what a public utility model is.
What is required to make it a public utility model service/system? From what I have researched in the past, it sounds like a fancy title that pretty much describes the system that most local (the creator of the thread works nearby me) ambulance services already uses.
I know that your system is heavily regulated by a government entity (the county), but it's day-to-day operations are managed by the private company that is contracted by the county.
Your system is primarily made up of advance life support units with very few basic life support units left over from a failed attempt at getting into the interfacility transport business.
You guys use a tiered response using the medical priority dispatching system (MPDS). I believe you guys send basic life support units to alpha level calls in a specific area (zone 2) only. I don't believe you utilize them for bravo level calls or calls with higher acuity per MPDS (even though it would still be following MPDS sending them to bravo level calls too).
I believe your EMTs are able to attend to calls during transport without a paramedic in the back (ie the paramedic is driving). The paramedic had already assessed the patient and determined that an EMT can be the primary care provider during transport.
Your system does system status management via a program called MARVLIS (mobile area routing and vehicle location information system). It''s a program that predicts were future calls will be at based on previous calls. It'll create a topographical map displaying areas in different colors with each different color representing the probability of a call being in that area. This will look like a blob. Dispatchers will post units based on this blob, which is where the phrase "following the blob," comes from. The program will make recommendations on which unit will get to the call the quickest.
To me, it pretty much sounds like a public utility model system already. The only changes I can imagine is eliminating the basic life support units and making it so at least one paramedic attends the patient during transport on all calls. Maybe they have to officially announce that the county is the government entity that regulates the system?