at an interchange that also serves PA 51. The Mon–Fayette Expressway heads northwest through rural areas with some nearby development. The highway reaches a diamond interchange with Old Pittsburgh Road which provides connections to US 40 and PA 51. Past this interchange, the tollway crosses into Menallen Township and runs through a mix of farmland and woodland. Farther northwest, PA Turnpike 43 comes to an interchange at Keisterville-Upper Middletown Road, which provides access to US 40 to the southwest. The Mon–Fayette Expressway enters Redstone Township, where it reaches the Redstone mainline toll plaza. The highway continues northwest through rural land and comes to a diamond interchange with US 40. Following this, the toll road heads northwest through rural areas to the south of Brownsville, crossing the Dunlap Creek into Luzerne Township. Here, PA Turnpike 43 reaches the Telegraph Road exit and curves to the northwest. The Mon–Fayette Expressway crosses the Monongahela River on the Mon–Fayette Expressway Bridge into Centerville in Washington County, where it curves north and comes to an interchange with PA 88. At this point, the road becomes toll-free again, though still owned by the PTC and signed PA Turnpike 43. PA 88 also joins the freeway for a short concurrency, with the road heading northeast through forested areas. The highway comes to a cloverleaf interchange with US 40, at which point PA 88 splits to the east to follow US 40 and PA Turnpike 43 continues northeast on the Mon–Fayette Expressway, entering California. The road continues through fields and woods, reaching an interchange with Malden Road that provides access to PA 88 Truck. The tollway continues north through dense woodland, bypassing the center of California to the west. The median widens as the highway comes to the exit for Elco Hill Road, after which it once again becomes a toll road. The median narrows again as PA Turnpike 43 curves northwest and comes to the California mainline toll plaza. A short distance later, the Mon–Fayette Expressway enters Fallowfield Township and comes to a cloverleaf interchange serving I-70. Past this interchange, the toll road winds north through more woodland and reaches a diamond interchange at Coyle Curtain Road, which provides access to the communities of Charleroi and Donora to the east. PA Turnpike 43 heads into Carroll Township and makes a sharp curve to the west, continuing through more rural areas. The tollway curves north again near a