Sunday, I attended the dedication of an ambulance and "First Due" car at Forest Hills (NY) Volunteer Ambulance Corps, followed by "Motorcade", and a picnic lunch, which the FHVAC supplied.
For the uninformed, Motorcade is several of the nearby VACs and VFDs send their secondary ambulances, and sometimes an engine company, and First Responder cars, as well as members with "buff-mobiles". They line up behind a vehicle, or vehicles, of the hosting corps, turn on all the lights, headlights, emergency and scene floods, and activate the sirens and airhorns, as they cruise around the district at speeds approaching 20 MPH. For participants, it's fun, but noisy.
The purpose of a Motorcade is to draw community attention, sometimes that there actually IS a volunteer ambulance service in the community, dedication of a new ambulance or First Responder/"Fly-Car", dedication of a new headquarters building, or the starting of a fund drive. Trust me, 10 emergency vehicles, an assortment of fly cars, and POVs with green (VAC) or blue (VFD) "Kojack" lights making noise while bunched up together, at low speed, garners attention, even if it is just calling the dispatch center to find out what the deuce is going on (dispatch will advise them, so a partial function has already been achieved).