[4]: 4 [1] The original plans for the Uptown Hudson Tubes called for a terminal at 33rd Street under the Gimbels department store, now Manhattan Mall.

During construction, the plan was changed so the 33rd Street station was directly under Sixth Avenue, providing for a future northward extension.

[9] On the H&M's seventeenth application, the Rapid Transit Commissioners declined the request for a delay, effectively ending the H&M's right to build an extension to Grand Central.

One of the proposed routes, the Sixth Avenue Line, ran parallel to the Uptown Hudson Tubes from Ninth to 33rd streets.

[18] A "Gimbels passageway" was formerly used by pedestrians to connect to Penn Station a block to the west under 33rd Street.

After years of safety and sanitation concerns, an epidemic of sexual assaults led to its closure in the 1980s.

More space for the operation was provided at Jersey City, allowing the detergent used on the cars to have more time to take effect.

Its completion allowed the PANYNJ to deactivate the car wash at 33rd Street, providing more flexibility in terminal operations there.