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.
Song Review by Richie Unterberger. The 59th Street Bridge Song (Feelin' Groovy) is one of the ultimate 1960s feel-good songs, from a decade that wasn't exactly short of them. Paul Simon sometimes has the image of being a detached, intellectual pessimist, but few popular songs are more optimistic.