Alignment The River Line was constructed on what originally was the
Camden-Bordentown section and the
Bordentown Branch of the
Camden and Amboy Railroad (C&A). The lines ran under the C&A name between 1830 and 1871, when the line was absorbed into the
Pennsylvania Railroad. Ownership proceeded under
Penn Central after 1968, and
Conrail from 1976 to June 1, 1999, but the original passenger service had been abandoned in 1963.
Planning The path to NJ Transit's River Line spanned at least three decades and over multiple planning agencies. An unrelated precursor to the NJ Transit River Line was the
Delaware River Port Authority's 1960 plan for rail rapid transit service to
Moorestown/
Mount Holly,
Lindenwold, and
Woodbury Heights/
Glassboro, using three existing railroad corridors. Implementation of the complete plan was considered unrealistically expensive. The DRPA elected to focus its resources on the most promising corridor, the Philadelphia–Lindenwold route. Construction on the
PATCO Speedline began in 1966 and was completed in 1969, re-using the 1936 Bridge Line subway and constructing a grade-separated heavy-rail line within the
Atlantic City Line right-of-way. The DRPA's original proposal did not include the alignment that became the River Line corridor, but planned to serve
Burlington County via the Mount Holly alignment. NJ Transit's planning for the
Burlington–Gloucester Transit System began in the early 1990s. The primary goals of the BGTS were: • Connecting South Jersey communities to
Philadelphia • Providing
streetcar service to downtown Camden • Providing regional rail transit service to Burlington and
Gloucester Counties A
Major Investment Study (MIS) published in 1996 concluded that a Gloucester route was more suitable than a Burlington route based on travel demand and citizen support. This study included substantial
public participation: fourteen open houses, three advisory committees, and other public outreach. The process found substantial neighborhood opposition to the
Mount Holly alignment through Burlington County: county freeholders publicly opposed the possibility. Opposition was particularly strong in
Moorestown Township, partly because of a potential street-running section. Meanwhile, Gloucester County leaders were largely ambivalent towards the project. Two special studies were commissioned to supplement the alternatives identified in the MIS. The second of these special studies examined the
Bordentown Secondary, another Conrail corridor through Burlington County, the alignment of today’s River Line. The parallel NJ Transit local bus on
U.S. Route 130 was heavily patronized, and the corridor was ripe for economic development. In November 1996, NJ Transit's board of directors approved a light rail transit alignment from Glassboro to Trenton with diesel-powered cars based on the findings of the special study. The board also established the initial operating corridor (IOC) to be the Trenton-Camden corridor. The draft
environmental impact statement (DEIS) was completed in 1998, and the contract with SNJRG was finalized in 1999, permitting the system to open to the public on March 14, 2004. The entire line was 100 percent funded by the State of New Jersey from its Transportation Trust Fund. No federal capital was expended for this diesel light rail project. Former NJ Transit executive director George Warrington has described the River Line as "the poster child for how not to plan and make decisions about a transit investment."
Pennsauken Transit Center The lack of a direct transfer between the River Line and NJ Transit's
Atlantic City Line, which crosses directly over the River Line in
Pennsauken, was highly criticized at the time of the River Line's opening. NJT subsequently reconsidered; in March 2009, NJT announced that an intermodal station linking the River Line and the Atlantic City Line would be constructed in Pennsauken. The new
intermodal station would include one low-level platform for River Line trains, two high-level platforms for Atlantic City Line commuter trains, and 280 parking spaces. A ground breaking ceremony was held for the
Pennsauken Transit Center on October 19, 2009. The second and final phase of construction was approved by the NJ Transit Board of Directors on July 13, 2011. NJ Transit opened the station to passenger service on October 14, 2013.
NJ Transit takeover On September 3, 2025, NJ Transit announced it would take over the line from Alstom. The takeover came following several years of equipment issues and reports of delays. Full takeover by NJ Transit will be completed by February 14, 2026. ==Ownership and time sharing agreement==