This polygon shapefile represents the boundaries of HUDs Community Challenge Grantee communities. These grants aim to reform and reduce barriers to achieving affordable, economically vital and sustainable communities. The funds are awarded to communities, large and small, to address local challenges to integrating transportation and housing. Such efforts may include amending or updating local master plans, zoning codes, and building codes to support private sector investment in mixed-use development, affordable housing and the re-use of older buildings. Other local efforts may include retrofitting main streets to provide safer routes for children and seniors, or preserving affordable housing and local businesses near new transit stations. This layer is intended for researchers, students, policy makers, and the general public for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production. This layer will provide a basemap for layers related to socio-political analysis, statistical enumeration and analysis, or to support graphical overlays and analysis with other spatial data. More advanced user applications may focus on demographics, urban and rural land use planning, socio-economic analysis and related areas (including defining boundaries, managing assets and facilities, integrating attribute databases with geographic features, spatial analysis, and presentation output.)