List of highways numbered 342

Australia

Canada

• Manitoba Provincial Road 342
• Newfoundland and Labrador Route 342
• Prince Edward Island Route 342
• Quebec Route 342
• Saskatchewan Highway 342

  Japan

• Japan National Route 342

  Nigeria

• A342 highway

  United Kingdom

• A342 road, Chippenham, Wiltshire to Andover, Hampshire

  United States

• Arkansas Highway 342
• Florida:
• * County Road 342
• * County Road 342
• Georgia State Route 342
• Indiana State Road 342
• Louisiana Highway 342
• Maryland Route 342
• Nevada State Route 342
• New York:
• * New York State Route 342
• ** New York State Route 342
• Ohio State Route 342
• Puerto Rico Highway 342
• Tennessee State Route 342
• Texas:
• * Texas State Highway 342
• * Texas State Highway Spur 342
• Virginia State Route 342
• Wyoming Highway 342