When the Baltimore Metro Subway opened on November 21, 1983, only the "Northwest" line of the 1965 plan had come to fruition. This segment provided service between Charles Center in Downtown Baltimore and Reisterstown Plaza in the northwest section of the city. On July 20, 1987, a addition extended the line from Reisterstown Road Plaza to Owings Mills in Baltimore County, much of it running in the median of I-795. A further extension of from Charles Center to Johns Hopkins Hospital was opened on 31 May 1995 .