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Massachusetts Bay Transportation Authority
Provides public transportation in the greater Boston area. Maps and schedules for commuter rail, and subway service.
Massachusetts Port Authority
Operates Logan International Airport and other facilities in the Commonwealth.
Massachusetts Turnpike Authority
Operates the Massachusetts Turnpike, an east-west highway from Boston to West Stockbridge on the New York border.
Massachusetts Water Resources Authority
Provides drinking water and wastewater treatment services to the greater Boston area.