The following items were discussed at the Signal Class on August 23, 2003:
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| A review of last months discussions on crossing circuits: |
Central Xing -- narrow gauge line back of museum - Single WigWag with motion detector and AFTAC audio overlay
Alpine Xing -- main line at museum entrance -- Dual WigWags with track circuit control
11th St Xing -- public crossing in Perris -- initial discussions only
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| Relay Contacts: |
Normal = NO TRAINS
Front = Closed when energized (UP)
Back = Closed when de-energized (DOWN)
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| NOTES: |
NEVER violate minimum FRA/AAR Standards but we can always make it "safer".
20 Seconds - minimum crossing protection prior to train
25 Seconds - usual design time for crossing protection prior to train
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