This document is the preliminary master plan and proposed sectional map amendment (SMA) for the Subregion 4 area. It implements the recommendations of the 2002 Prince George's County Approved General Plan; replaces the 1985 Approved Master Plan for Suitland-District Heights and Vicinity, Planning Areas 75A and 75B and the 1993 Approved Master Plan and Sectional Map Amendment for Landover and Vicinity (Planning Area 72); and updates the 2000 Approved Sector Plan and Sectional Map Amendment for the Addison Road Metro Town Center and Vicinity, the 2004 Approved Sector Plan and Sectional Map Amendment for Morgan Boulevard and Largo Town Center Metro Areas, the 2006 Approved Suitland Mixed-Use Town Center Zone Development Plan, and the 2005 Approved Sector Plan and Sectional Map Amendment for the Tuxedo Road/Arbor Street/Cheverly Metro Area. It builds upon the 2006 Central Avenue Transit-Oriented Development Corridor Development Strategy, the Greater Central Avenue Public Facilities Implementation Plan, and the 2009 Marlboro Pike Preliminary Sector Plan and Proposed Sectional Map Amendment. Developed with input from the community, this document recommends goals, policies, strategies, and actions pertaining to development patterns, zoning, environmental infrastructure, transportation systems, public facilities, parks and recreation, economic development, historic preservation, and urban design. The SMA proposes zoning changes to implement the recommendations of the sector plan.