Grand Central Terminal Station 100th Anniversary, New York City, United States

The terminal also did away with bifurcating Park Avenue by introducing a "circumferential elevated driveway" that allowed Park Avenue traffic to traverse around the building and over 42nd Street without encumbering nearby streets. The building was also designed to eventually reconnect both segments of 43rd Street by going through the concourse if the City of New York demanded it.
- Terminal City
The construction of Grand Central created a mini-city within New York, including the Commodore Hotel and various office buildings. It spurred construction throughout the neighborhood in the 1920s including the Chrysler Building.
In 1928, the New York Central built its headquarters in a 34-story building (now called the Helmsley Building) straddling Park Avenue on the north side of the Terminal.