In message , rublex
writes

Perhaps if properly calculated you could have people getting off at
different stops in different (locked) carriages, perhaps stations with
the same fare could have the same carriage if there are more stations
than coaches, or the complete opposite if there are ticket checks at
the higher priced station.

Shades of the way the London & Blackwall Railway operated when it first
opened in 1840 - a set of rope-hauled carriages all left the terminus
together, the back one being slipped off at Shadwell, the next at
Stepney, the next at Limehouse, the next at West India Docks and the
next at Poplar, leaving the two at the front to go through to Blackwall.
Since they free-wheeled into the station each needed its own
guard-cum-brakesman.

Not a huge success, I believe. One particular difficulty is you cannot
travel between intermediate stops - if only carriage 2 is opened at
station B and only carriage 4 is opened at station D, how do you travel
from B to D?

--
Paul Terry