With West Virginia nearing completion of their portion of the Mon-Fayette Expressway, PennDot is looking to moving US 119 onto it, once the Mon-Fayette is completed, to Interstate 68. According to the minutes of the August 20, 2009 meeting of the Morgantown Metropolitan Planning Organization, PennDot "...wishes to [ask] AASHTO to resign that section of the Mon-Fayette Expressway as U.S. 119. Pennsylvania wishes to immediately place U.S. 119 signage on the interstate and overlap from Exit 1 on I-68, across Cheat Lake."
Under the Pennsylvania proposal, US 119 would no longer leave the freeway at Morgantown Road (un-numbered exit; mile 12), but it would now continue on the toll road south into West Virginia and then west on Interstate 68 until Exit 1.
However, West Virginia prefers that US 119 leave I-68 at Exit 7 and continue to run through downtown Morgantown.
Above: A scan from a 2009 PennDot State Map showing the under construction Mon-Fayette Expwy (in Green) US 119 and Interstate 68. Both the PA/WV plan would move US 119 to the east along the Mon-Fayette Expressway all the way to Interstate 68. Pennsylvania's plan has US 119 leaving I-68 and heading south at Exit 1. West Virginia's has US 119 leaving I-68 at Exit 7 and along its present alignment through Morgantown.
Of course all of this is up to AASHTO's approval, and US highways have generally not been allowed to be signed on toll roads.
Thanks to Brian Powell for some additional details.