Facilities
The tunnel has many operation and safety facilities. Among them are emergency telephones and cameras at 100 m intervals. Fire-safety equipment includes infrared sensors, fire extinguishers, foam sprayers, and pushbutton alarms. Emergency exits leading to a separate emergency path are located no more than 350 m apart. Stairways lead up to Yamate Street. A duct running parallel to the roadway supplies fresh air and removes exhaust. Dust-collection systems are designed to remove 80% of particulates from the air.
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—George Bernard Shaw (18561950)