The New Hampshire Turnpike System presently consists of 89 miles of limited access highway, 36 miles of which are part of the U.S. Interstate Highway System, comprising a total of approximately 643 total lane miles. Since beginning operations in 1950, the Turnpike System has contributed to the development of the New Hampshire economy. It has also been a major factor in the growth of the tourist industry in the state. The Turnpike System is comprised of three limited access highways: the Blue Star Turnpike (I-95) and the Spaulding Turnpike, which are collectively referred to as the Eastern Turnpike, and the Central Turnpike, which is commonly known as FE Everett Turnpike and constitutes portions of I-293 and I-93.