2010 2016 JMRI Suzie Tall suzie_tall@yahoo.co.uk 1.0 2016-12-02 ST Initial Version 2 2020-03-05 GM Initial version of the 1980 C&O Signal rules. This set was created by back dating the CSX-2014-Chessie rule set created by Suzi Tall. Back dating required removal of some aspects and altering the mapping to compensate for their removal. While based on the 1980 rule book, they are the same rules that were in affect in 1969. C&O 1980 3-1 Head Lower Marker Absolute High Signal RYG-R As described in the 1980 version of the Chessie System Operating Rules "Signal Rules - 281-292". Appearances for a double 3-1 lamp signal head mast with red lower head and without other badging Clear green red Rule 281 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3-1r-hi/rule-C1281.gif Approach yellow red Rule 285 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3-1r-hi/rule-C1285.gif Stop red red Rule 292 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3-1r-hi/rule-C1292.gif Unlit dark dark - ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3-1r-hi/CO-3-1r-hi.gif Stop Stop Stop Unlit Clear Clear Approach Medium Clear Medium Clear Approach Medium Approach Slow Approach Approach Slow Clear Approach Clear Medium Approach Approach Slow Clear Approach Slow Approach Approach Restricting Approach Stop and Proceed Approach Stop Approach