The following highways are numbered 346:
Australia Avenel-Nagambie Road
Canada Manitoba Provincial Road 346 Newfoundland and Labrador Route 346 Quebec Route 346
Japan Japan National Route 346
United States Georgia State Route 346 (former) Iowa Highway 346 Kentucky Route 346 Louisiana Highway 346 Maryland Route 346 New York: New York State Route 346 County Route 346 (Erie County, New York) County Route 346 (Wayne County, New York) Pennsylvania Route 346 Puerto Rico Highway 346 South Carolina Highway 346 Tennessee State Route 346 Texas: Texas State Highway 346 (former) Farm to Market Road 346 Vermont Route 346 Virginia State Route 346