The following roads are numbered 18:

Canada

• Alberta Highway 18
• British Columbia Highway 18
• Manitoba Highway 18
• Prince Edward Island Route 18
• Saskatchewan Highway 18

Japan

• Route 18 (Japan)

Russia

• M18 Motorway running from Saint Petersburg to Murmansk

United Kingdom

• A18

road that links Doncaster with Ludborough in Lincolnshire

United States

• U.S. Route 18
• State Route 18 (Alabama)
• State Route 18 (California)
• Delaware Route 18
• State Road 18 (Florida)
• Illinois Route 18
• State Road 18 (Indiana)
• Louisiana Highway 18
• Route 18 (Massachusetts)
• Maryland Route 18
• M-18 (Michigan highway)
• Minnesota State Highway 18
• Route 18 (Missouri)
• New Hampshire Route 18
• Route 18 (New Jersey)
• New York State Route 18
• North Carolina Highway 18
• North Dakota Highway 18
• Ohio State Highway 18
• State Highway 18 (Oklahoma)
• Route 18 (Oregon)
• Tennessee State Route 18
• State Highway 18 (Texas)
• State Route 18 (Virginia)
• State Route 18 (Washington)
• West Virginia Route 18
• Highway 18 (Wisconsin)

See also

• Route 18 Band