What do you call the setup used in some transit systems (especially light rail) where there's a central control but not really a dispatcher? The trains themselves broadcast coded identification and destination, and at points where lines branch off or regularly used crossovers a reader at the station prior to the switch reads the ID and sets things appropriately. Unless something's haywire, Central doesn't actually do anything other than take reports. When things do go haywire, as they will per Murphy's Law, Central can override signals and switches or instruct the driver to use manual overrides at the stations, but ordinarily the system more or less runs itself. ??

The system does have signals, but 'blocks' are mostly just from one station to the next where the line is on private r/w (in the street it uses traffic signals sometimes with a "T" head added). Purpose seems to mainly be to hold a train in the station until the crossing gates are all verified active (again, automatically), or provide a yellow if something isn't right (if that happens, it's restricted speed and stop and proceed at each crossing until the next station). Trains of course have speed trips per signal indication.

Strictly speaking, it's not ATC because the drivers still run the trains. Some elements of ATS, perhaps, but other things not commonly found in traditional RR signaling are also present like the trains talking to the wayside equipment to set routes.