20092010JMRI DickBronson BobJacobsen jake@physics.berkeley.edu 1 2009-12-27 DB More appearances 1.1 2010-01-01 RGJ Add author and revision info 2.0 2011-06-24 DB Added mapping information 2.1 2023-02-21 BM Added some missing mappings AAR 1946 Double head dwarf signal As described in the August 1946 version of the AAR publication "American Railway Signaling Principles and Practices", chapter II. Appearances for a two-searchlight dwarf signal head without other badging Clear green green Page 42 F ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-287.gif Approach Medium yellow green Page 44 C ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-282.gif Advance Approach yellow yellow Page 44 C ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-282A.gif Slow Clear green red Page 48 B ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-287.gif Slow Approach yellow red Page 48 ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-288.gif Restricting red yellow Page 49 C ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-290.gif Stop red red Page 50 D ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-2-low/rule-292.gif Stop Stop Clear Clear Slow Clear Clear Alt Clear Slow Clear Advance Approach Medium Clear Approach Limited Clear Limited Clear Approach Medium Approach Medium Approach Medium Advance Approach Clear Approach Medium Medium Clear Approach Medium Medium Advance Approach Approach Medium Slow Approach Medium Approach Slow Advance Approach Approach Medium Approach Slow Advance Approach Approach Medium Approach Advance Approach Approach Medium Slow Approach Medium Approach Advance Approach Approach Medium Slow Approach Slow Clear Slow Clear Slow Approach Slow Approach Restricting Slow Approach Restricting Stop Slow Approach Restricting Stop and Proceed Slow Approach Restricting Stop and Proceed Medium Slow Approach Restricting Permissive Slow Approach Restricting Permissive Medium Slow Approach Restricting