The Connecting Railway was a subsidiary of the Pennsylvania Railroad, incorporated to build a connection between the Philadelphia and Trenton Railroad and the PRR in the city of Philadelphia. The PRR controlled the Philadelphia & Trenton, and had originally intended to directly connect the two lines through the heart of Philadelphia. However, attempts to buy out and demolish buildings in the right-of-way led to riots, and the Philadelphia & Trenton was forced to end at Kensington. To resolve the problem, Connecting Railway Company was incorporated May 15, 1863, and between 1864 and June 1867, constructed a 6.75-mile (10.86 km) connecting line between Frankford Junction on the Philadelphia & Trenton and Mantua Junction (now Zoo interlocking) on the PRR main line, passing through what is now North Philadelphia.