The PW&B and the B&P were combined into the PRR's Philadelphia, Baltimore and Washington Railroad in 1902.The B&O ended local service on the Frederick Branch in November 1949.The Camden Line runs about 39 miles (63 km) between Washington, D.
On March 1, 1974, the Maryland Department of Transportation (MDOT) began a 50% subsidy of the B&O's Washington-Brunswick and Washington-Baltimore service - the first state-sponsored commuter rail service to Washington.
Later in the decade, West Virginia began to fund the B&O shuttles between Brunswick and Martinsburg; the shuttles were soon incorporated as extensions of Brunswick service in order to secure Urban Mass Transportation Administration subsidies.
The B&O first began service over portions of this route in 1830, making it one of the oldest passenger rail lines in the U. C., and Perryville, Maryland, via Baltimore Penn Station over Amtrak's Northeast Corridor and Washington Terminal District.
It is purported to be the fastest commuter rail line in North America, with trains of bi-level cars and electric locomotives capable of operating at speeds up to 125 miles per hour (201 km/h).
All B&O passenger service between Baltimore and Philadelphia ended in 1958; local service from Washington was curtailed to Camden Station.