This is Street Wars, a weekly series on the battle for space on New York’s streets and sidewalks.

A plan to create a park in the middle of Park Avenue, which runs north to south along Manhattan’s East Side, might seem strange at first.

The location of the proposed green space, stretching from 46th Street to 57th Street, is a busy commercial corridor. There are multiple lanes of traffic and boxy, shimmering steel and glass office towers, including Lever House and the Seagram Building.

And though there are lush flowers in the median, especially along the residential portion north of 57th Street, Park Avenue is not known for being associated with an actual park.

But underneath the avenue is the Grand Central Train Shed, the hidden infrastructure that acts as an artery for Metro-North Railroad trains. The shed is over 100 years old and in desperate need of repair.

That presents an opportunity for the Department of Transportation to reimagine the streetscape above.