List of highways numbered 174

Canada

• Ottawa Regional Road 174
• Prince Edward Island Route 174

  Costa Rica

• National Route 174

  Ireland

• R174 road

  Japan

• Route 174

  United States

• Interstate 174
• Alabama State Route 174
• California State Route 174
• Connecticut Route 174
• Georgia State Route 174
• Illinois Route 174
• Kentucky Route 174
• Louisiana Highway 174
• Maine State Route 174
• Maryland Route 174
• M-174
• Missouri Route 174
• New Jersey Route 174
• New Mexico State Road 174
• New York State Route 174
• *New York State Route 174X
• Ohio State Route 174
• Pennsylvania Route 174
• South Carolina Highway 174
• Tennessee State Route 174
• Texas State Highway 174
• * Texas State Highway Spur 174
• * Farm to Market Road 174
• Utah State Route 174
• Virginia State Route 174
• Washington State Route 174
• Wisconsin Highway 174
• Wyoming Highway 174

• Puerto Rico Highway 174