The Atlantic Avenue Mixed-Use Plan is a comprehensive initiative involving amendments to the Zoning Map and Zoning Resolution, designation of Urban Development Action Areas and Projects, and disposition of city-owned properties to facilitate mixed-use and residential developments. It encompasses multiple parcels across Brooklyn, including 516 Bergen Street, 1110 Atlantic Avenue, 457 Nostrand Avenue, 1134-1142 Pacific Street, and 542 Dean Street. The plan involves various zoning changes, such as R5 to R6, R6 to R3A/R6A, R4 to R7D, R7-1 to R8X, M1-1 to C4-3A/C4-5D/C6-3A/M1-3A/M1-1A/R6B/M1-2A/R6A/M1-3A/R7D/M1-4A/R9A, and establishing new C2-4 districts and a Special Atlantic Avenue Mixed Use District. These changes are intended to support housing preservation and development, including mandatory inclusionary housing.