Whistle Sign

are ST: in.

Location and Uses
NaN Whistle Signs are NaN Signs along the sides of the NaN Spirit Tracks (Object)s. They indicate areas where NaN Trains are regulated to sound their NaN Whistles. NaN Passengers may become upset if ST: does not follow the instructions of NaN Whistle Signs. Despite this, ST: does not normally need to follow the NaN Whistle Signs.