20092010JMRI DickBronson BobJacobsen jake@physics.berkeley.edu 1 2010-01-01 DB Initial version 1.1 2011-06-23 DB Added mapping information 1.2 2018-06-22 DB Updated for PRR 1956 PRR 1956 Position light dwarf signal As described in the October 1956 version of the PRR publication "Rules for conducting transportation", Signal Rules. Appearances for a dwarf position light signal head without other badging Slow Clear green Page 61 ../../../resources/icons/smallschematics/aspects/PRR-1956/PL-1-low/rule-287.gif Slow Approach green Page 62 ../../../resources/icons/smallschematics/aspects/PRR-1956/PL-1-low/rule-288.gif Restricting yellow Page 64 ../../../resources/icons/smallschematics/aspects/PRR-1956/PL-1-low/rule-290.gif Stop red Page 66 ../../../resources/icons/smallschematics/aspects/PRR-1956/PL-1-low/rule-292.gif Stop Stop Clear Block Slow Clear Clear Slow Clear Approach Medium Slow Clear Medium Clear Slow Clear Medium Approach Slow Clear Approach Slow Slow Clear Approach Slow Clear Caution Slow Clear Slow Approach Slow Clear Slow Clear Slow Clear Slow Approach Slow Clear Permissive Block Slow Approach Restricting Slow Approach Stop and Proceed Slow Approach Stop Slow Approach