October 2, 1972, after I-76 west of Monroeville moved to the Pennsylvania Turnpike and replaced I-80S, the western part of the highway took the I-279 designation while the section from Pittsburgh east to Monroeville would become the first section with the I-376 designation. When I-376 was extended onto the Parkway West in 2009, I-279 was truncated to its current southern terminus at the former western terminus of I-376. PA 18 Business was decommissioned in 1978 when PA 18 returned to its former alignment (where it has remained to this day) and PA 60 was extended all the way to Hermitage. On November 30, 1992, the gap in Beaver County was completed with a toll highway. When the Beaver Valley Expressway started opening in 1991, it would receive the "PA Toll 60" designation, because it was operated by the PTC. With the opening of the Southern Expressway in 1992, PA 60 moved to that highway, while the Airport Parkway received the PA 60 Bus designation. PA 60 was eventually extended to Sharon in 1997, ending at US 62 Bus. 2009 extensions As part of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users in 2005, Congress had designated an expansion of I-376 past I-79 and along present day US 22/US 30 and PA 60 through Pittsburgh International Airport and north to I-80 near Sharon. This was done because the airport was one of the few major airports in the US without direct access to an Interstate Highway. This routing required some major infrastructure work on US 22 west of Downtown Pittsburgh (particularly at the US 22/US 30 cloverleaf interchange in Robinson Township) and safety improvements to PA 60; though both were controlled-access freeways before the extension, they were not up to Interstate Highway standards in all areas. The improvements to both the US 22/US 30 cloverleaf in Robinson Township and the Lawrence County leg of the route, as well as replacing all of the signs with the I-376 shield, were funded by the American Recovery and Reinvestment Act of 2009. The designation of I-279 from Downtown west through the Fort Pitt Tunnel to I-79 was officially dropped and replaced by that of I-376 on June 10, 2009. I-279 still exists between I-376 in the Golden Triangle and I-79 in Franklin Park. On November 6, 2009, officials announced the initial transition was complete. On January 21, 2010, the remainder