In a move sure to anger motorists, Westminster Council has painted a nine inch double yellow line in Caxton Street, central London.
The lines appeared recently painted on the road between a taxi rank and some parking bays.
Leith Penny, Westminster City Council's strategic director for city management, said: "This was a mistake by a contractor. We are obviously not happy about it, because double yellow lines should play an important part in traffic management and road safety.
"But on this occasion we can see how absurd this looks and we will make sure it is corrected."
Earlier this year, double yellow lines stretching for just 13 inches were discovered on a street in Cambridge.
The lines were painted on a gap between parking bays in Humberstone Road, West Chesterton, by Cambridgeshire County Council.