Vehicle location is a radio discipline before it is a network one. The earliest implementations are a transit and traffic concern — a bus announcing itself to a signal controller so an intersection can hold a green — and they sit next to the strobe and the inductive loop as one option among several for telling a signal that something is coming.

What happens next is the part worth recording. The platform spreads sideways into operations: public works, solid waste, code enforcement, animal care. Nobody designs that migration; it happens because a department discovers the capability exists and asks for it. A census taken years later describes an estate nobody specified, and the shape of that census tells you more about an organization than the total does.

The split that does not happen is just as informative. Patrol cars and fire apparatus are the vehicles an outsider would assume were tracked first, and they are usually on something else entirely — a dispatch platform with its own location layer, on its own radio or cellular bearer, under a different agency’s budget and a different regulator’s rules. A municipal fleet estate therefore has a seam running through it that is organizational rather than technical, and any claim that one platform tracked “the fleet” needs checking against which fleet.

Underneath both, the transport is the unglamorous dependency: wireless bridges, serial links carried over a network by device servers, and later cellular. The telemetry is trivial; getting it off the vehicle reliably is the engineering.