1. Having a lane for traffic in each direction and a centre lane for passing

See also: multilane

• unanimated
• unanimity
• unanimous
• unanimously
• unannealed
• unannounced
• unanswerable
• unanswered
• unanticipated
• unapologetic
• unappareled
• unapparelled
• unapparent
• unappealable
• unappealing
• unappealingly
• unappeasable
• unappendaged
• unappetising
• unappetisingness
• unappetizing
• unappetizingness
• unappreciated
• unappreciative
• unappreciatively