in 1893, congress passed a law mandating that existing streets must be changed or moved in order to be in conformity with the district's street plan. some property owners were upset that their private property would need to be seized without compensation in order to move streets in conformance with the street plan. the supreme court agreed, striking down the law as unconstitutional. in 1893, congress mandated a new system of highways within the district that conformed to the city of washington's street plan but left existing streets in place. a separate act of congress in 1895 required that the street names in georgetown be changed to conform to the street naming system used in the city of washington. however, the old street names were shown on maps as late as 1899.