Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pennsylvania Route 78 was a 55-mile (89 km) long north south state highway located in western Pennsylvania. The southern terminus of the route was at Pennsylvania Route 8 in Brady Township. The northern terminus was at Pennsylvania Route 408 in Richmond Township. The route was deleted in 1961 and replaced with Pennsylvania Route 173 from PA 8 to Pennsylvania Route 27 and Pennsylvania Route 198 from PA 27 to Gilbert Road four miles (6 km) south of PA 408.