WEST MIFFLIN, Pa.-(WPXI) — Phase three of the Mon/Fayette Expressway is about to get underway, bringing new construction to parts of Jefferson Hills and Duquesne. At an open house on Wednesday, Pennsylvania Turnpike leaders outlined plans for the next section of the long-running project. This phase will extend the toll road from Route 51 in Jefferson Hills to Route 837 in Duquesne. Construction will impact areas near Camp Hollow Road and Pittsburgh McKeesport Boulevard. Crews plan to excavate land, close some roads for weeks at a time and build noise walls. The expressway is funded through oil company franchise tax revenue, toll revenue and a state transportation funding law signed in 2013. Turnpike officials said limited funding has created challenges in completing the overall project. Officials said that because funding is evaluated based on state revenue, which remains low, there is no set timeline for when the entire expressway will be finished.