Department of BuildingsThese are lines that occurred on the city's 1901-1905 set of master plans for all proposed roads. If a highway planning line crosses a particular property, that land cannot become a Record Lot by subdivision, even if the proposed street is no longer needed or will never be built. However there is a procedure through which a proposed road can be removed from the Highway Plan freeing up affected land for subdivision or development.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/036b658d91a649378c2706068a82cbcb_29engOpen Data DCPublicHighway Plan Lines [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of ColumbiaLast Modified: 2026-01-08