What is "construction train"

Construction \Con*struc"tion\, n. [L. constructio: cf. F. construction.]

1. The process or art of constructing; the act of building; erection; the act of devising and forming; fabrication; composition.

2. The form or manner of building or putting together the parts of anything; structure; arrangement.

   An astrolabe of peculiar construction.
   --Whewell.

3. (Gram.) The arrangement and connection of words in a sentence; syntactical arrangement.

   Some particles . . . in certain constructions have the sense of a whole sentence contained in them.
   --Locke.

4. The method of construing, interpreting, or explaining a declaration or fact; an attributed sense or meaning; understanding; explanation; interpretation; sense.

   Any person . . . might, by the sort of construction that would be put on this act, become liable to the penalties of treason.
   --Hallam.

   Strictly, the term [construction] signifies determining the meaning and proper effect of language by a consideration of the subject matter and attendant circumstances in connection with the words employed.
   --Abbott.

   Interpretation properly precedes construction, but it does not go beyond the written text.
   --Parsons.

   Construction of an equation (Math.), the drawing of such lines and figures as will represent geometrically the quantities in the equation, and their relations to each other.

   Construction train (Railroad), a train for transporting men and materials for construction or repairs.