Here in Edmonton we have both ambulances as well as SUVs for EMS. (Known as rapid response units.)With the high level of OD's here in the Lower Mainland, it was overwhelming the combined response by EHS/Police/Fire/Social workers and volunteers. Some of the Fire halls despatch a Pickup truck with two guys to medical calls and the remainder stay with the pumper. This cuts down on wear and tear on the main appliances and would allow the pumper to respond to a fire and get setup while the other team is enroute. I think that is the way to go for halls with high medical call outs.
The idea is that one experienced ACP (advanced care paramedic) can handle a majority of calls that don’t require transport. (Minor vehicle accident, call for minor incident at senior home, etc)
This allows the ambulances to be free for when they are needed, so they aren’t attending a call where the ambulance vehicle itself isn’t required.