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.
What new slang was introduced during the 70s that you can think of? This is a list of all the words that were in popular usage during the 70s. We also have pages on this topic devoted to the 80s and 90s. skinney. real deal or truth ex let me give you the slinney on the deal.