Sound Transit Light Rail. Downtown Seattle Transit Tunnel (DSTT). Communication Challenges. The Downtown Seattle Transit Tunnel (DSTT) presents a significant communications challenge: Passengers, buses, and trains must interact efficiently and safely.
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Traction electrification system
Station electrical equipment
Fare collection equipment
Flood detectors/sump pumps
Access control devices
Fire suppression systemCentral Control System (CCS)
Monitors and Controls:
An Emergency Management Panel (EMP) can request control of the Downtown Seattle Transit Tunnel communications system in an emergency situation. EMPs are located at station surface or mezzanine level entry points
ICC Workstation provides Telephone Control