20092010JMRI GregMcCartney gpmccartney@gmail.com 1 2016-01-26 GPM Initial version of the the NW color light, search light, and semaphore signals. N&W 1981 Color Light Single Arm Permissive Mast Signal As described in the 1981 version of the Norfolk and Western Railroad Operating Rules. Appearances N&W absolute color, search, and semaphore mast signals Clear green Page 60 ../../../resources/icons/smallschematics/aspects/NW-1981/NW-SL-1-high-permissive/rule-281.gif Approach yellow Page 63 ../../../resources/icons/smallschematics/aspects/NW-1981/NW-SL-1-high-permissive/rule-285.gif Stop and Proceed red Page 66 ../../../resources/icons/smallschematics/aspects/NW-1981/NW-SL-1-high-permissive/rule-291.gif Stop and Proceed Stop and Proceed Clear Clear Approach Diverging Clear Advance Approach Clear Diverging Clear Approach Diverging Approach Diverging Approach Approach Clear Diverging Approach Approach Slow Clear Approach Slow Approach Approach Restricting Approach Stop and Proceed Approach Stop and Stay Approach