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 with Low Marker 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 with a lower green marker Clear green dark Page 142 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/Rule-W281.gif Approach Diverging yellow green Page 142 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/Rule-W282.gif Approach yellow dark Page 143 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/Rule-W285.gif Stop and Proceed red dark Page 145 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/Rule-W291.gif Not Lit dark dark ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/unlit.gif Stop and Proceed Stop and Proceed Not Lit ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG-G_Permissive/unlit.gif Clear Clear Approach Diverging Clear Diverging Clear Approach Diverging Approach Clear Diverging Approach Approach Diverging Slow Clear Approach Diverging Slow Approach Approach Diverging Restricting Approach Stop and Proceed Approach Stop Approach