20092010JMRI GregMcCartney gpmccartney@gmail.com 1 2016-12-15 GPM Initial version of the signal set. 2 2019-12-30 BM Add missing 'Not Lit' aspect definition WM 1980 US&S R-2 Single Arm Permissive Mast Signal As described in the 1980 version of the Chessie System Railroads Operating Rules. Appearances of WM single arm permissive US&S R-2 mast signals Clear green Page 60 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Permissive/Rule-W281.gif Approach yellow Page 63 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Permissive/Rule-W285.gif Stop and Proceed red Page 66 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Permissive/Rule-W291.gif Not Lit dark ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Permissive/unlit.gif Stop and Proceed Stop and Proceed Not Lit ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Permissive/unlit.gif Clear Clear Approach Diverging Clear Advance Approach Clear Diverging Clear Approach Approach Clear Diverging Approach Approach Slow Clear Approach Slow Approach Approach Restricting Approach Stop and Proceed Approach Stop and Stay Approach