Towing Depot:
Tow Trucks: Realistically Dispatchers (atleast in US)also handle tow vehicles So maybe yall can add them
Ambulance Station:
Corner Vans: A van to pickup bodies if an Ambulance cant save a person the corner transport
Field Hospitals: A Truck and Trailer (Or Big Bus) That Can Transport 5 Patients and can Treat The Amount of crew members. EX: 6 Crew Members 12 Patients (six remains) ((But if only one can only treat one at a time till full))
Towing Depot: Can Also Transport Wrecked Vehicles To Large Towing Depot, or any Large Police Station (it would go to the impound lot)
Edit**
Fire Department:
Paramedic Engines: In ambulance extensions Functions Like A Fly Car and Engine
Part of Same Edit**
Ambulance Stations
Make flycars be able to fully treat patients that dont need transport.