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 (Nigeria)

  United Kingdom

• A342 road, Chippenham, Wiltshire to Andover, Hampshire

  United States

• Arkansas Highway 342
• Florida:
• * County Road 342 (Gilchrist County, Florida)
• * County Road 342 (Leon County, Florida)
• 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