The width of an auxiliary lane should be equal to the through lanes. Where auxiliary lanes are provided along freeway main lanes, the adjacent shoulder should desirably be 2.4 to 3.6m [8 to 12 ft] in width, with a 1.8m [6 ft] wide shoulder being the minimum considered.
Lubbock County is a county located in the U.S. state of Texas. As of the 2010 census, the population was 278,831. Its county seat is Lubbock. The county was created in 1876 and organized in 1891. It is named for Thomas Saltus Lubbock, a Confederate colonel and Texas Ranger (some sources give his first name as Thompson).
At the 2010 census, Lubbock had a population of 229,573, making it the 87th most populous city in the United States and the 11th most populous city in Texas. The city is the economic center of the Lubbock metropolitan area, which had an estimated 2009 population of 276,659. Lubbock's nickname is the Hub City, which derives from it being the economic, education, and health care hub of a multi-county region commonly called the South Plains.