The Pennsylvania Turnpike Commission will open two new sections of the Mon-Fayette Expressway to traffic on Nov. 20.
The sections will combine to extend the expressway’s northern terminus about 5 miles, from the Route 51 Interchange in Jefferson Hills to Camp Hollow Road in West Mifflin.
The expressway is currently 54 miles long and mostly serves as a toll road. Its southern terminus feeds into Interstate 68 near Morgantown, W. Va…