 During the first two weeks of each calendar quarter, all rolling stock was moved through the wye to reverse the orientation of the equipment.In the first and third quarters of each calendar year, equipment would be turned so that the red disc faced away from the Hanks Yard office; during the second and fourth quarters, equipment would again be turned so the red disc would be visible from that office.If normal train operations resulted in rolling stock oriented with its red disc facing the wrong way, it would have to be turned as soon as practicable to face the proper way for that quarter.