20092010JMRI JamesKoretsky KenCameron 1 2012-08-31 JK Initial version 1.1 2012-11-06 KSC Added basic aspect mappings BN Double 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 two-searchlight signal head or semaphore which are used in Automatic Block, CTC and Interlocking Systems Clear green dark Rule 230 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-230-b.gif Advance Approach yellow green Rule 232 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-232.gif Approach Diverging yellow yellow Rule 233 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-233.gif Approach Medium flashyellow red Rule 234 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-234-a.gif Approach Restricting yellow lunar Rule 235 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-235.gif Approach yellow red Rule 236 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-236-a.gif Diverging Clear red green Rule 237 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-237.gif Diverging Approach Medium red flashyellow Rule 238 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-238.gif Diverging Approach red yellow Rule 239 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-239.gif Restricted Proceed red flashred Rule 241 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-241-a.gif Stop red red Rule 242 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-2-high/rule-242.gif Stop Stop Stop Approach Medium Restricted Proceed Approach Medium Approach Medium Approach Approach Clear Clear Clear