[4] Although the Camden and Amboy lines became part of the Pennsylvania system, formal ownership remained with the United New Jersey Railroad and Canal Company through the Penn Central merger and bankruptcy.

[5] The importance of the Amboy Branch as a through route for passengers lessened after the parallel line between Trenton and Newark, New Jersey (now Amtrak's Northeast Corridor) was electrified.

[9] Broadway station, approximately 0.5 miles (0.80 km) to the east, served as the terminus for Pennsylvania and Pennsylvania-Reading Seashore Lines services until 1966.

Broadway was also the eastern terminus of the rapid transit Bridge Line, forerunner of the modern PATCO Speedline.

[10] Broadway closed in October 1966 as part of an urban redevelopment plan in Camden that included the demolition of the Pennsylvania's elevated route through the city.

[13] Prior to the Penn Central's bankruptcy and the creation of Conrail, the Pennsylvania Railroad abandoned the line between Hightstown and Windsor, New Jersey, splitting the branch.

[14] Conrail sold the entirety of the Bordentown Secondary to NJ Transit in 1999 for $67.5 million for a planned conversion to light rail operation.

[18] At the beginning of 2010, Conrail was made eligible for $2 million in funds from the New Jersey Department of Transportation for a proposed project to make upgrades to the Robbinsville Industrial Track.

[23] The New Jersey Department of Transportation undertook work to improve the at-grade crossings for the line in Monroe Township in 2006,[24] and again in 2010.