Re:An 89-year-old Reinventing the Train in His Backyard
by goodcanadian on Sunday June 18, 2017 @01:42PM
(#14581853)
. . . short passing lanes (terminology?) . . .
I believe "siding" is the word you are looking for.
You'd only need to move the disabled carriage / section to one of those to enable at least some capacity for the line to continue operating.
That was my interpretation of the comment.