Pennsylvania State Route 488 runs east-west in West-Central Butler County. It runs from the Lawrence/Butler County Line, near Portsville, to U.S. Rt. 422, near Prospect. PA St Rt 488 passes through the following towns in Butler County. Portersville Prospect PA St Rt 488 is multi-plexed in Butler County. U.S. Rt. 19, at Portersville. PA St Rt 488 intersects the following towns in Butler COunty. U.S. Rt. 19, at Portersville. U.S. Rt. 19, at Portersville. Interstate 79, near Portersville. U.S. Rt. 422, at Portersville.
