20092010JMRI GregMcCartney gpmccartney@gmail.com 1 2017-03-16 GPM Original Edition SOU 1981 1 Arm CL Absolute Mast Signal As described in the 1981 version of the Southern Railway Signal Rules. Appearances for 1 arm color light absolute mast signals Clear green ../../../resources/icons/smallschematics/aspects/SOU-1981/SOU-CL-1-Arm-high-absolute/rule-301.gif Approach Slow flashyellow ../../../resources/icons/smallschematics/aspects/SOU-1981/SOU-CL-1-Arm-high-absolute/rule-306.gif Approach yellow ../../../resources/icons/smallschematics/aspects/SOU-1981/SOU-CL-1-Arm-high-absolute/rule-307.gif Stop red ../../../resources/icons/smallschematics/aspects/SOU-1981/SOU-CL-1-Arm-high-absolute/rule-310.gif Stop Stop Clear Clear Approach Diverging Clear Advance Approach Clear Diverging Route Clear (Medium) Approach Diverging Route Clear (Slow) Approach Slow Approach Slow Clear Diverging Route Approach Slow (Medium) Approach Diverging Route Approach Slow (Slow) Approach Slow Approach Clear Diverging Route Approach (Medium) Approach Diverging Route Approach (Slow) Approach Slow Restricted Proceed Approach Stop Approach