A delineator includes a delineator body, a positioning member, and a reflective sheet. The delineator body and the positioning member include mounting features adapted to mate with each other at a plurality of positions corresponding to different positions of the positioning member on the delineator body. By selecting one of the different positions of the positioning member on the delineator body, the user can select a visibility configuration of the delineator. In some cases the reflective sheet may be bonded to the positioning member, so that the reflective sheet is positioned at a particular place on the delineator and visible to an observer when the positioning member is mounted in the selected position. In other cases the reflective sheet may be bonded to the delineator body, and the positioning member may cover one portion of the reflective sheet and leave another portion of the reflective sheet exposed to an observer.