The following highways are numbered 511:
Canada Alberta Highway 511 Ontario Highway 511 (former)
United Kingdom A511 road
United States U.S. Route 511 (former) Florida State Road 511 (former) County Road 511 (Brevard County, Florida) Nevada State Route 511 (former) County Route 511 (New Jersey) Ohio State Route 511 Farm to Market Road 511 Territories Puerto Rico Highway 511