New York Avenue northeast of the White House retains its uninterrupted character. It originally terminated at Boundary Avenue (now Florida Avenue NE, as all city streets did in the L'Enfant Plan. Extensive development occurred beyond Boundary Avenue from 1870 to 1900. Extension of New York Avenue to Bladensburg Road was considered as early as 1899. But no action was taken. The McMillan Plan, a master plan for the capital published in 1901, strongly endorsed extension of the street. But although many portions of the plan were acted on, no road construction occurred. Plans were drawn up in 1903 to extend the street about beyond the "city limits" to reach the Ivy City development, but these, too, fell through. In 1907, as construction of Union Station was under way, the Baltimore and Ohio Railroad (B&O) created a diversion track (beginning at Ivy City) so that its passenger trains could reach the new station. As part of this effort, the B&O was required to build a bridge to carry New York Avenue over its new track route, extending New York Avenue to Fourth Street NE. The B&O built the bridge and extension, but the bridge remained unused for decades.