List of highways numbered 422

Canada

• Manitoba Provincial Road 422
• Newfoundland and Labrador Route 422

  Japan

• Route 422

  United States

• Interstate 422
• U.S. Route 422
• Georgia State Route 422
• Louisiana Highway 422
• Maryland Route 422
• New York State Route 422
• Oregon Route 422
• * Oregon Route 422S
• Puerto Rico Highway 422
• Tennessee State Route 422
• Texas State Highway Spur 422