The new U.S. Interstate highway system begun in the 1950s and the new Hampton Roads Bridge-Tunnel in 1958 helped transform Virginia Beach from a tiny resort town into one of the state's largest cities by 1963, and spurring the growth of the Hampton Roads region linked by the Hampton Roads Beltway. In the western portion of the state, completion of north-south Interstate 81 brought better access and new businesses to dozens of counties over a distance of as well as facilitating travel by students at the many Shenandoah area colleges and universities. The creation of Smith Mountain Lake, Lake Anna, Claytor Lake, Lake Gaston, and Buggs Island Lake, by damming rivers, attracted many retirees and vacationers to those rural areas. As the century drew to a close, Virginia tobacco growing gradually declined due to health concerns, although not at steeply as in Southern Maryland. A state community college system brought affordable higher education within commuting distance of most Virginians, including those in remote, underserved localities. Other new institutions were founded, most notably George Mason University and Liberty University. Localities such as Danville and Martinsville suffered greatly as their manufacturing industries closed.