The following highways are numbered 90:

• BR-090

• Newfoundland and Labrador Route 90
• Winnipeg Route 90

• A90 motorway
• EO90 road

• Highway 90 (Israel–Palestine)

• Autostrada A90

• Gukjido 90

• New Zealand State Highway 90

• A90 road
• M90 motorway

• Interstate 90
• U.S. Route 90
• Arizona State Route 90
• Arkansas Highway 90
• California State Route 90
• Colorado State Highway 90
• Florida State Road 90
• Georgia State Route 90
• Illinois Route 90
• Iowa Highway 90 (1926–1932) (former)
• K-90 (Kansas highway)
• Kentucky Route 90
• Maine State Route 90
• Maryland Route 90
• M-90 (Michigan highway)
• Minnesota State Highway 90 (former)
  • County Road 90 (St. Louis County, Minnesota)
• Missouri Route 90
• Nebraska Highway 90 (former)
  • Nebraska Spur 90A
  • Nebraska Spur 90B
• Nevada State Route 90 (former)
• New Jersey Route 90
  • County Route 90 (Bergen County, New Jersey)
• New Mexico State Road 90
• New York State Route 90
  • County Route 90 (Cattaraugus County, New York)
  • County Route 90 (Dutchess County, New York)
  • County Route 90 (Jefferson County, New York)
  • County Route 90 (Oneida County, New York)
  • County Route 90 (Orange County, New York)
  • County Route 90 (Rensselaer County, New York)
  • County Route 90 (Rockland County, New York)
  • County Route 90 (Saratoga County, New York)
  • County Route 90 (Steuben County, New York)
  • County Route 90 (Suffolk County, New York)
  • County Route 90 (Westchester County, New York)
• North Carolina Highway 90
• Ohio State Route 90 (1923) (former)
• Oregon Route 90 (former)
• Pennsylvania Route 90 (1920s-1960s) (former)
• South Carolina Highway 90
• Tennessee State Route 90
• Texas State Highway 90
  • Texas State Highway Loop 90
  • Farm to Market Road 90
• Utah State Route 90
• Virginia State Route 90
• West Virginia Route 90
• Wisconsin Highway 90 (former)
• Wyoming Highway 90

• A90