Erie south to Pittsburgh) to Charleston, West Virginia, in 1963 resulted in changes to I-70. On February 26, 1964, as part of the formation of I-76 (east of Downtown Pittsburgh), the American Association of State Highway and Transportation Officials (AASHTO) approved a rerouting of I-70 along I-70S. The former I-70 became I-79 from Washington to downtown Pittsburgh and I-76 to and along the Turnpike to New Stanton. This brought the routing of I-70 to its present form. Future In 2011, the Pennsylvania Department of Transportation (PennDOT) began preliminary work for a total reconstruction of I-70 between the West Virginia state line and New Stanton. Approximately $500 million will be spent on this segment of highway in order to improve it to modern Interstate standards, half of which will be spent redesigning eight interchanges. Other planned improvements include six overpass replacements, a new roadbed, a wider median, electronic ITS signage, and widening the I-70/I-79 concurrency in Washington to six lanes. Two noteworthy interchange projects will occur in conjunction with the I-70/I-79 widening. Underway is a reconfiguration of the east/south split between I-70 and I-79, which will eliminate the one-lane, low-speed loop ramp from I-79 northbound to I-70 westbound, replacing it with a two-lane, high-speed flyover ramp. Preliminary design work has also been completed for a redesigned interchange between I-70/I-79 and Murtland Avenue (US 19), and involves replacing the existing substandard cloverleaf in favor of the first diverging diamond interchange in Pennsylvania. Exit list See also References External links Pennsylvania Highways: Interstate 70 I-70 at AARoads.com Pennsylvania Roads - I-70 Pennsylvania 70 Transportation in Washington County, Pennsylvania Transportation in Westmoreland County, Pennsylvania Transportation in Somerset County, Pennsylvania Transportation in Bedford County, Pennsylvania Transportation in Fulton County, Pennsylvania Toll roads in Pennsylvania