The Trenton Cutoff is a 48-mile (77 km) rail corridor in the U.S. state of Pennsylvania that runs from Morrisville to Glenloch. Today used by Norfolk Southern, it consists of two rail lines: the Morrisville Line, which runs between Morrisville and Ernest, and the Dale Secondary between Ernest and Glenloch.

The Pennsylvania Railroad, legal name The Pennsylvania Railroad Company, also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia. It was named for the commonwealth in which it was established. At its peak in 1882, the Pennsylvania Railroad was the largest railroad, the largest transportation enterprise, and the largest corporation in the world.