20092010JMRI DavidBaker 1 2010-01-01 DB Initial version 1.1 2011-06-24 DB Added mapping information 2.0 2015-04-26 DB Fixing general items after I got a 1949 rule book NW-1949 Single position light high permissive signal As described in the Norfolk and Western Railway Company March 1949, Rules and Regulations for the Government of the Operating Department: Diagrams of Signal Aspects Appearances for single position light signal head **WITHOUT** marker light. Clear green Page 101 ../../../resources/icons/smallschematics/aspects/NW-1949/PL-1-high-pbs/rule-281.gif Approach yellow Page 105 ../../../resources/icons/smallschematics/aspects/NW-1949/PL-1-high-pbs/rule-285.gif Stop and Proceed red Page 108 ../../../resources/icons/smallschematics/aspects/NW-1949/PL-1-high-pbs/rule-291.gif Stop and Proceed Stop and Proceed Clear Clear Approach Medium Clear Advance Approach Clear Medium Clear Clear Approach Clear Restricting Approach Stop and Proceed Approach Stop and Stay Approach