of the route except for the Beaver Valley Expressway started receiving the I-376 signs. The stretch of PA 60 from I-80 in Shenango Township of Mercer County north past PA 18 (where the freeway terminates and the highway reverts to being a two-lane arterial) to the former northern terminus of PA 60 in Sharon became PA 760. On August 1, 2010, signage along PA Turnpike 60 was officially changed to I-376, and, unlike other tolled highways with an Interstate designation, it is not grandfathered from Interstate standards. Having been built in the early 1990s, this section was already up to Interstate standards. This section of I-376 is signed as "Toll I-376", with a black-on-yellow "Toll" sign above the I-376 trailblazer. This makes I-376 one of the first tolled Interstates with such a marker, which was a new addition to the 2009 edition of the Manual on Uniform Traffic Control Devices. Despite PennDOT giving motorists over four years of advance notice on the I-376 extension, some local drivers were confused after the transition was complete, thinking that the I-376 extension was going to be an all-new highway instead of a renaming of PA 60. As part of the ongoing upgrades to I-376 to bring the legacy portion of the former PA 60 up to Interstate standards, the interchange with PA 318 at exit 1C was upgraded to a full service interchange in October 2014. Previously, the exit only had a westbound entrance and eastbound exit, mainly to serve as access to I-80 to West Middlesex residents. It marked the third partial interchange on the legacy PA 60/Parkway West to be upgraded to a full-service interchange in a decade, after I-79 at exit 64A and access to US 30 at exit 52 were upgraded from partial to full-service interchanges. Exit list Business loop Interstate 376 Business (I-376 Bus) or Business Loop 376 (BL 376), known locally as the Airport Parkway, is a Interstate Highway business loop in Moon Township and Findlay Township in Pennsylvania. Its western terminus is at I-376 and Flaugherty Run Road (exits 50 and 51) north of PIT. Its eastern terminus is at I-376's exit 57, southeast of PIT. Before November 6, 2009, and after the Southern Expressway was completed in 1992, this road was known as PA 60 Bus. Prior to that, it had the regular PA 60 designation; this was also originally the last leg of the