View all text of Subjgrp 120 [§ 236.526 - § 236.534]
§ 236.531 - Trip arm; height and distance from rail.
Trip arm of automatic train stop device when in the stop position shall be maintained at a height above the plane of the tops of the rails, and at a horizontal distance from its center line to gage side of the nearest running rail, in accordance with specifications of the carrier.