20092010JMRI GregMcCartney gpmccartney@gmail.com 1 2016-12-15 GPM Initial version of the signal set. WM 1980 US&S R-2 Single Arm Absolute Mast Signal As described in the 1980 version of the Chessie System Railroads Operating Rules. Appearances of WM single arm absolute US&S R-2 mast signals Clear green Page 142 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Absolute/Rule-W281.gif Approach yellow Page 143 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Absolute/Rule-W285.gif Stop red Page 146 ../../../resources/icons/smallschematics/aspects/WM-1980/WM_RYG_Absolute/Rule-W292.gif Stop Stop 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 Approach