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 Code of Federal Regulations (Last Updated: July 5, 2024)
 Title 49 - Transportation
 Subtitle B - Other Regulations Relating to Transportation
 Chapter XII - Transportation Security Administration, Department of Homeland Security
 SubChapter D - Maritime and Land Transportation Security
 Part 1580 - Rail Transportation Security

  Appendix A to Part 1580 - High Threat Urban Areas (HTUAs)  

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  • Appendix A to Part 1580 - High Threat Urban Areas (HTUAs)

    State Urban area Geographic areas
    AZ Phoenix Area Chandler, Gilbert, Glendale, Mesa, Peoria, Phoenix, Scottsdale, Tempe, and a 10-mile buffer extending from the border of the combined area.
    CA Anaheim/Santa Ana Area Anaheim, Costa Mesa, Garden Grove, Fullerton, Huntington Beach, Irvine, Orange, Santa Ana, and a 10-mile buffer extending from the border of the combined area.
    Bay Area Berkeley, Daly City, Fremont, Hayward, Oakland, Palo Alto, Richmond, San Francisco, San Jose, Santa Clara, Sunnyvale, Vallejo, and a 10-mile buffer extending from the border of the combined area.
    Los Angeles/Long Beach Area Burbank, Glendale, Inglewood, Long Beach, Los Angeles, Pasadena, Santa Monica, Santa Clarita, Torrance, Simi Valley, Thousand Oaks, and a 10-mile buffer extending from the border of the combined area.
    Sacramento Area Elk Grove, Sacramento, and a 10-mile buffer extending from the border of the combined area.
    San Diego Area Chula Vista, Escondido, and San Diego, and a 10-mile buffer extending from the border of the combined area.
    CO Denver
    Area    		 Arvada, Aurora, Denver, Lakewood, Westminster, Thornton, and a 10-mile buffer extending from the border of the combined area.
    DC National Capital Region National Capital Region and a 10-mile buffer extending from the border of the combined area.
    FL Fort Lauderdale Area Fort Lauderdale, Hollywood, Miami Gardens, Miramar, Pembroke Pines, and a 10-mile buffer extending from the border of the combined area.
    Jacksonville Area Jacksonville and a 10-mile buffer extending from the city border.
    Miami Area Hialeah, Miami, and a 10-mile buffer extending from the border of the combined area.
    Orlando Area Orlando and a 10-mile buffer extending from the city border.
    Tampa Area Clearwater, St. Petersburg, Tampa, and a 10-mile buffer extending from the border of the combined area.
    GA Atlanta Area Atlanta and a 10-mile buffer extending from the city border.
    HI Honolulu Area Honolulu and a 10-mile buffer extending from the city border.
    IL Chicago Area Chicago and a 10-mile buffer extending from the city border.
    IN Indianapolis Area Indianapolis and a 10-mile buffer extending from the city border.
    KY Louisville Area Louisville and a 10-mile buffer extending from the city border.
    LA Baton Rouge Area Baton Rouge and a 10-mile buffer extending from the city border.
    New Orleans Area New Orleans and a 10-mile buffer extending from the city border.
    MA Boston Area Boston, Cambridge, and a 10-mile buffer extending from the border of the combined area.
    MD Baltimore Area Baltimore and a 10-mile buffer extending from the city border.
    MI Detroit Area Detroit, Sterling Heights, Warren, and a 10-mile buffer extending from the border of the combined area.
    MN Twin Cities Area Minneapolis, St. Paul, and a 10-mile buffer extending from the border of the combined entity.
    MO Kansas City Area Independence, Kansas City (MO), Kansas City (KS), Olathe, Overland Park, and a 10-mile buffer extending from the border of the combined area.
    St. Louis Area St. Louis and a 10-mile buffer extending from the city border.
    NC Charlotte Area Charlotte and a 10-mile buffer extending from the city border.
    NE Omaha Area Omaha and a 10-mile buffer extending from the city border.
    NJ Jersey City/Newark Area Elizabeth, Jersey City, Newark, and a 10-mile buffer extending from the border of the combined area.
    NV Las Vegas Area Las Vegas, North Las Vegas, and a 10-mile buffer extending from the border of the combined entity.
    NY Buffalo Area Buffalo and a 10-mile buffer extending from the city border.
    New York City Area New York City, Yonkers, and a 10-mile buffer extending from the border of the combined area.
    OH Cincinnati Area Cincinnati and a 10-mile buffer extending from the city border.
    Cleveland Area Cleveland and a 10-mile buffer extending from the city border.
    Columbus Area Columbus and a 10-mile buffer extending from the city border.
    Toledo Area Oregon, Toledo, and a 10-mile buffer extending from the border of the combined area.
    OK Oklahoma City Area Norman, Oklahoma and a 10-mile buffer extending from the border of the combined area.
    OR Portland Area Portland, Vancouver, and a 10-mile buffer extending from the border of the combined area.
    PA Philadelphia Area Philadelphia and a 10-mile buffer extending from the city border.
    Pittsburgh Area Pittsburgh and a 10-mile buffer extending from the city border.
    TN Memphis Area Memphis and a 10-mile buffer extending from the city border.
    TX Dallas/Fort Worth/Arlington Area Arlington, Carrollton, Dallas, Fort Worth, Garland, Grand Prairie, Irving, Mesquite, Plano, and a 10-mile buffer extending from the border of the combined area.
    Houston Area Houston, Pasadena, and a 10-mile buffer extending from the border of the combined entity.
    San Antonio Area San Antonio and a 10-mile buffer extending from the city border.
    WA Seattle Area Seattle, Bellevue, and a 10-mile buffer extending from the border of the combined area.
    WI Milwaukee Area Milwaukee and a 10-mile buffer extending from the city border.