The following highways are numbered 234:
Australia Borung Highway
Canada Manitoba Provincial Road 234 Newfoundland and Labrador Route 234 Prince Edward Island Route 234 Quebec Route 234
Costa Rica National Route 234
India National Highway 234 (India)
Ireland R234 regional road
Italy Strada statale 234 Codognese
Japan Japan National Route 234
Nigeria A234 highway (Nigeria)
United Kingdom road B234 road
United States California State Route 234 (unbuilt) Florida State Road 234 (former) Georgia State Route 234 Indiana State Road 234 K-234 (Kansas highway) Kentucky Route 234 Maine State Route 234 Maryland Route 234 Montana Secondary Highway 234 New Mexico State Road 234 New York State Route 234 (former) Oregon Route 234 Pennsylvania Route 234 Tennessee State Route 234 Texas State Highway 234 Texas State Highway Loop 234 Utah State Route 234 (former) Virginia State Route 234 Wyoming Highway 234