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 1.2 2010-01-11 DB Typo Correction 2.0 2011-06-24 DB Added mapping information B&O 1957 Single searchlight high permissive signal As described in the August 1946 version of the AAR publication "American Railway Signaling Principles and Practices", chapter II. Appearances for one-searchlight signal head with number or letter plate Clear green Page 42 C ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-high-pbs/rule-281.gif Approach yellow Page 47 C ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-high-pbs/rule-285.gif Permissive yellow Page 49 ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-high-pbs/rule-289.gif Stop and Proceed red Page 50 B ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-high-pbs/rule-291.gif Stop and Proceed Stop and Proceed Clear Clear Advance Approach Medium Clear Approach Limited Clear Limited Clear Clear Approach Medium Clear Advance Approach Clear Medium Clear Clear Medium Advance Approach Clear Medium Approach Slow Clear Approach Slow Clear Approach Approach Medium Approach Approach Clear Clear Approach Approach Restricting Approach Stop Approach