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 word grunge dates from 1972, but did not enter popular terminology until the birth of the Seattle sound, a mix of heavy-metal, punk, and good old-fashioned rock and roll, in the late 1980s. Many musicians associated with grunge credit their exposure to early punk bands as one of their most important influences.