20092010JMRI DickBronson PaulBender 1 2010-01-01 DB Initial version 2 2010-01-12 PAB Adapted from NYCS-1937 3 2013-07-09 PAB Add aspect mapping 4 2013-07-10 PAB Add signal icons 5 2019-03-17 PAB fix image links SLSF Double searchlight signal with triangle placard As described in the July 1978 Revision of the St. Louis San Francisco Railway Company publication "RULES for the Maintenance of way and Structures" effective July 1,1973, chapter titled Description of Signals. As noted in the source material, these rules are rules of the Frisco Transportation department. Appearances for a two-searchlight signal head with a triangular plackard. Provides an alternate Restricting appearance. Clear green red Rule 281 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-281.gif Advance Approach yellow yellow Rule 282 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-282.gif Approach Limited yellow green Rule 283 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-283.gif Approach yellow red Rule 285 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-285.gif Diverging Clear red green Rule 286 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-286.gif Diverging Approach red yellow Rule 287 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-287.gif Restricting red lunar Rule 288 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-288-b.gif Stop and Proceed red red Rule 290 ../../../resources/icons/smallschematics/aspects/SLSF-1973/SL-2-high/rule-290.gif Stop and Proceed Stop and Proceed Stop Approach Stop and Proceed Approach Grade Approach Restricting Approach Diverging Approach Approach Limited Diverging Clear Approach Limited Approach Advance Approach Approach Medium Clear Approach Limited Clear Advance Approach Clear Clear Clear