With the business seemingly successful, the WB&A purchased the Baltimore & Annapolis Short Line in 1921.
It became known as the "North Shore Line" and the Annapolis to Odenton line as the "South Shore Line".
 At this time, the B&A gave up its terminus at the Camden Street Station of the Baltimore and Ohio Railroad and started using the WB&A terminal on Liberty Street (between Lexington and Fayette) in Baltimore.
 Prior to 1921 the WB&A and B&A had run on separate, parallel tracks from Linthicum to Baltimore.
 But on March 16, 1921, a crossover connected the two parallel tracks at Linthicum operations ceased on the B. & O. track, and a new terminal was built at the southwest corner of South Howard and West Lombard Streets (current site after the early 1970s of Holiday Inn hotel) across from the Baltimore Civic Center (1st Mariner Arena).
The WB&A now consisted of 81 miles of track and the only practical way to get from Washington, D.C., to Annapolis.
With the business seemingly successful, the WB&A purchased the Baltimore & Annapolis Short Line in 1921. It became known as the "North Shore Line" and the Annapolis to Odenton line as the "South Shore Line".  At this time, the B&A gave up its terminus at the Camden Street Station of the Baltimore and Ohio Railroad and started using the WB&A terminal on Liberty Street (between Lexington and Fayette) in Baltimore.  Prior to 1921 the WB&A and B&A had run on separate, parallel tracks from Linthicum to Baltimore.  But on March 16, 1921, a crossover connected the two parallel tracks at Linthicum operations ceased on the B. & O. track, and a new terminal was built at the southwest corner of South Howard and West Lombard Streets (current site after the early 1970s of Holiday Inn hotel) across from the Baltimore Civic Center (1st Mariner Arena). The WB&A now consisted of 81 miles of track and the only practical way to get from Washington, D.C., to Annapolis.
Washington, Baltimore and Annapolis Electric Railway