20092010JMRI JamesKoretsky KenCameron 1 2010-02-08 JK Initial version 1.1 2012-11-06 KSC Added basic aspect mappings BN Triple searchlight signal As described in the October 1989 Burlington Northern Railroad Southern Region, Debraska Division Timetable #2. In effect at 0001 Continental Mountain Time, Sunday October 29, 1989. Appearances for a three-searchlight signal head or semaphore which are used in Automatic Block, CTC and Interlocking Systems. Provides several alternate appearances. Clear green red red Rule 230 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-230-a.gif Advance Approach yellow green red Rule 232 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-232.gif Approach Diverging yellow yellow red Rule 233 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-233.gif Approach Medium flashyellow red red Rule 234 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-234-a.gif Approach Restricting yellow lunar red Rule 235 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-235.gif Approach yellow red red Rule 236 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-236-a.gif Diverging Clear red green red Rule 237 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-237-a.gif Diverging Approach Medium red flashyellow red Rule 238 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-238.gif Restricted Proceed red red lunar Rule 241 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-241-d.gif Stop red red red Rule 242 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-3-high/rule-242.gif Stop Stop Stop Approach Restricted Proceed Approach Diverging Approach Approach Diverging Approach Medium Approach Medium Diverging Clear Clear Approach Approach Medium Approach Restricting Approach Approach Medium Clear Approach Diverging Clear Advance Approach Approach Medium Clear Clear