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Legend (PublicWorks/Traffic_Signal)

Traffic Signal Backup System (3)
Battery Backup System (lasts 4-6 hours) Battery Backup System (lasts 4-6 hours)
Hydrogen Fuel Cell (lasts 68-72 hours) Hydrogen Fuel Cell (lasts 68-72 hours)
No Backup System No Backup System
Flashing Beacon (2)