The minimum and usual mainlane width is 12 ft [3.6 m]. The number of lanes required to accommodate the anticipated traffic in the design year is determined by the level of service evaluation as discussed in the Highway Capacity Manual.
Adj. groovy is 1853 in lit. sense of of a groove; 1937 in slang sense of excellent, from jazz slang phrase in the groove (1932) performing well (without grandstanding).. As teen slang for wonderful, it dates from 1944; popularized 1960s, out of currency by 1980.
The slang word flap was used for a young prostitute as early as 1631. By the 1890s, the word flapper was emerging in England as popular slang both for a very young prostitute, and in a more general â and less derogatory sense â of any lively mid-teenage girl.