Yellow and green lantern uses
Author: ex-BN
Date: 02-28-2012 - 19:21
In the Consolidated Code of Operating Rules (1980) it states: "A yellow flag or a yellow light displayed to the right of the track as viewed from an approaching train or engine indicates that beginning at a point two miles from the yellow signal the train or engine must proceed at a speed of not more than 10 MPH unless a different speed is specified by train order bulletiin or general order.
Speed must not be increased until entire train has passed a green flag or a green light displayed to the right of the track indicating the end of the restriction."
A yellow flag or light was also used to allow a train to proceed from a red flag when radios were not available.