Complex sentence: A similar operation with the 6 ft 0 in broad gauge Delaware, Lackawanna and Western Railroad, joining at Hampton, began May 27,1856, requiring the addition of a third rail onto the standard gauge CNJ.
Split into simpler sentences: A similar operation with the Delaware, Lackawanna and Western Railroad, joining at Hampton, began May 27,1856. This required the addition of a third rail to join the broad gauge DL&W onto the standard gauge CNJ.