substrate
Whether the space layer's three movement hold queues appear on the summary report.
Off before this is ever called: GuidedPathSpace silences them in its own initializer, and this subsystem relies on that rather than repeating it. (It did repeat it, with a comment arguing the repeat was necessary. Removing the line changed nothing, which is how the repetition was found.)
Worth switching on only for a model that has stopped moving and needs to be looked at, because under this paradigm the row means something other than it appears to. The passive subsystem's queue holds loads being carried, so its number in queue is a line of work waiting. Here it holds vehicle agents, so the same row is a count of carts under way wearing the name of a queue -- the most misleading row this subsystem could produce, and the one a reader is least likely to question.
Note that this cannot be driven from the base class's initializer: it reaches the space layer, and that does not exist until this subclass's own properties are built.