The following highways are numbered 348:
Australia
Brazil SP-348: Rodovia dos Bandeirantes
Canada Manitoba Provincial Road 348 Nova Scotia Route 348 Prince Edward Island Route 348 Quebec Route 348
India National Highway 348 (India)
Japan Japan National Route 348
United Kingdom A348 road, Trickett's Cross to Poole, Dorset
United States Arkansas Highway 348 Colorado State Highway 348 Georgia State Route 348 Kentucky Route 348 Louisiana Highway 348 Maryland Route 348 New York: New York State Route 348 (former) County Route 348 (Erie County, New York) Ohio State Route 348 Pennsylvania Route 348 Puerto Rico Highway 348 Tennessee State Route 348 Texas: Texas State Highway 348 (former) Texas State Highway Spur 348 Virginia State Route 348