From Streetsblog: Brennan Drops Plan for More Atlantic Yards Parking, Will Push Transit Instead

As noted, this was a bad idea.

In his message to Streetsblog, Assemblyman Jim Brennan said:

You should know that my intention was not to increase parking, but to compensate for the fact that the Empire State Development Corporation eliminated Ratner’s obligation to provide 2300 units of underground parking at the arena as part of the deal to delay completion of the project until 2035. My focus next session will be to find incentives for mass transit.

Well, so it is Forest City Ratner and the ESDC's focus.

Note that only 1100 spaces are supposed to serve the arena, with the rest of the approximately 3600 aimed at the apartments. In other words, there were never "2300 units" for arena-goers.