From Longman Dictionary of Contemporary Englishtailbacktail‧back /ˈteɪlbæk/ noun [countable] 1 British EnglishTTC a line of traffic that is moving very slowly or not moving at all a five-mile tailback on the M252 American English the player who is the furthest back from the front line in American football
Examples from the Corpus
tailback• Both carriageways were closed for eight hours causing huge tailbacks.• But flustered John's ordeal only ended when police went to investigate what was causing the two-mile tailback near Gateshead.• Southbound there were tailbacks for miles. 