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.
Cockney rhyming slang is a form of English slang which originated in the East End of London. Many of its expressions have passed into common language, and the creation of new ones is no longer restricted to Cockneys. Up until the late 20th Century, rhyming slang was also common in Australian slang, probably due to the formative influence of cockney on Australian English.