Richmond Connection
The Richmond, Fredericksburg and Potomac and Richmond and Petersburg Railroad Connection was chartered March 3, 1866, and opened May 1, 1867, as a connection between the RF&P and the Richmond and Petersburg Railroad (later part of the Atlantic Coast Line Railroad) west of downtown Richmond.
It was operated jointly by those two companies.
In addition, a downtown connection was owned by the R&P past Broad Street Station.

Louisa
The Louisa Railroad was chartered in 1836, running from the RF&P at Doswell west to Louisa.
At first it was operated as a branch of the RF&P, but it was reorganized as the Virginia Central Railroad in 1850 and merged into the Chesapeake and Ohio Railroad in 1868 as its oldest predecessor.

Rosslyn
In 1896, the Washington Southern Railway opened a 1.13 miles (1.82 km) branch that connected the south end of the Long Bridge in Jackson City to the south end of the Aqueduct Bridge in Rosslyn.
The Railway built much of the branch within the grade of the old disused Alexandria Canal.

In 1904, the Rosslyn Connecting Railroad, which the Philadelphia, Baltimore and Washington Railroad controlled, acquired the branch on the same day (February 29) that the railroad was incorporated in accordance with Virginia law.
The Rosslyn Connecting Railroad abandoned nearly all of its line in 1962 and closed in 1969 after operating for 65 years.

In 1977, the Washington Metropolitan Area Transit Authority opened a surface-level section of Metrorail's Blue Line that replaced most of the section of the Rosslyn Connecting Railroad's line that had traveled within the Alexandria Canal's grade.
The section of the Blue Line parallels Virginia State Route 110 where passing Arlington National Cemetery.
Richmond Connection
The Richmond, Fredericksburg and Potomac and Richmond and Petersburg Railroad Connection was chartered March 3, 1866, and opened May 1, 1867, as a connection between the RF&P and the Richmond and Petersburg Railroad (later part of the Atlantic Coast Line Railroad) west of downtown Richmond. It was operated jointly by those two companies. In addition, a downtown connection was owned by the R&P past Broad Street Station.
Louisa
The Louisa Railroad was chartered in 1836, running from the RF&P at Doswell west to Louisa. At first it was operated as a branch of the RF&P, but it was reorganized as the Virginia Central Railroad in 1850 and merged into the Chesapeake and Ohio Railroad in 1868 as its oldest predecessor.
Rosslyn
In 1896, the Washington Southern Railway opened a 1.13 miles (1.82 km) branch that connected the south end of the Long Bridge in Jackson City to the south end of the Aqueduct Bridge in Rosslyn. The Railway built much of the branch within the grade of the old disused Alexandria Canal.
In 1904, the Rosslyn Connecting Railroad, which the Philadelphia, Baltimore and Washington Railroad controlled, acquired the branch on the same day (February 29) that the railroad was incorporated in accordance with Virginia law. The Rosslyn Connecting Railroad abandoned nearly all of its line in 1962 and closed in 1969 after operating for 65 years.
In 1977, the Washington Metropolitan Area Transit Authority opened a surface-level section of Metrorail's Blue Line that replaced most of the section of the Rosslyn Connecting Railroad's line that had traveled within the Alexandria Canal's grade. The section of the Blue Line parallels Virginia State Route 110 where passing Arlington National Cemetery.
Richmond, Fredericksburg and Potomac Railroad