Gray Line

Gray Line or Grey Line may refer to:

Transportation

 * Grey Line (Bangkok), a planned monorail line in Bangkok, Thailand
 * Grey Line (Delhi Metro), Delhi, India
 * Gray Coach, a former Canadian inter-city bus line based in Toronto
 * E Embarcadero, San Francisco, California
 * Jubilee line, London, England
 * Line 6 Finch West, Toronto, Canada
 * Line 9 (Shenzhen Metro), Shenzhen, China
 * Metro (Minnesota), lettered lines are color-coded "METRO Gray", Minneapolis—Saint Paul, Minnesota
 * Olympic Park railway line, Sydney, Australia
 * Pujiang line, Shanghai, China
 * Serpukhovsko-Timiryazevskaya line, known as the Grey Line, Moscow, Russia
 * Silver Line (Dallas Area Rapid Transit), a commuter rail line in Texas
 * Silver Line (Grand Rapids), Grand Rapids, Michigan
 * Lynx Silver Line, a proposed transit extension in Charlotte, North Carolina
 * Silver Line (MBTA), a system of bus lines in Boston, Massachusetts
 * METRORapid Silver Line, Houston, Texas
 * Silver Line (Mexico City), Mexico City
 * Silver Line (San Diego Trolley), a heritage streetcar line operated by the San Diego Trolley
 * Silver Line (Washington Metro), a rapid transit line of the Washington Metro system
 * HealthLine, Cleveland, Ohio
 * J Line (Los Angeles Metro), formerly the Silver Line, Los Angeles, California
 * Silver Line (Pittsburgh), a light rail line of the Pittsburgh Light Rail system

New York City Subway

 * BMT Canarsie Line
 * L (New York City Subway service)
 * S (New York City Subway service), three separate rapid transit subway shuttles

Other uses

 * Gray Line Worldwide, an international sightseeing operator
 * Grayline lascar
 * Terminator (solar) or grey line, delimiting the illuminated and dark sides of a planetary body