Inside the Manhattan borough of New York City "streets" are close to twenty for each mile, whilst the key numbered "avenues" are about 6 per mile. (Centerline to centerline, 42nd Road to 22nd Road is purported to be 5250 ft even though 42nd Street to 62nd Road is alleged to be[clarification wanted] 5276Â ft 8 in.)[citation necessary] Metric mile[