Here are some usefull links dealing with Mass Transit Travel listed by city:

• Atlanta, Georgia
  • Metropolitan Atlanta Rapid Transit Authority
• Baltimore, Maryland
  • Maryland Transit Administration
• Boston, Massachusetts
  • Massachusetts Bay Transportation Authority
• Chicago & Arlington Heights, Illinois
  • Regional Transportation Authority
• Cleveland, Ohio
  • Greater Cleveland Regional Transit Authority
• Dallas, Texas
  • Dallas Area Rapid Transit Authority
• Denver, Colorado
  • Regional Transportation District
• Honolulu, Hawaii
  • City and County of Honolulu Department of Transportation Services
• Houston, Texas
  • Metropolitan Transit Authority of Harris County, Texas
• Jersey City, New Jersey
  • Port Authority of New York and New Jersey
• Los Angeles, California
  • Los Angeles County Metropolitan Transportation Authority
  • Southern California Regional Rail Authority
• Miami, Florida
  • Miami-Dade Transit Agency
• New York, New York
  • New York City Department of Transportation
  • Metropolitan Transit Authority
• Newark, New Jersey
  • New Jersey Transit Corporation
• Oakland, California
  • San Francisco Bay Area Rapid Transit District
• Philadelphia, Pennsylvania
  • Southeastern Pennsylvania Transportation Authority
• Pittsburgh, Pennsylvania
  • Port Authority of Allegheny County
• Portland, Oregon
  • Tri-County Metropolitan Transportation District
• Saint Paul & Minneapolis, Minnesota
  • Metropolitan Council
• San Diego, California
  • San Diego Metropolitan Transit System
• San Francisco, California
  • San Francisco Municipal Railway
• Seattle, Washington
  • King County Department of Transportation
• Washington, D.C.
  • Washington Metropolitan Area Transit Authority

Information regarding transit agencies not listed here may be found on the Internet or by telephoning the agency directly.

• Rail in the U.S.
  
• Rail Security
  
• Rail Prohibited Items
  
• Rail Resources