Right of way plats for state and federal roads, filed on aperture cards by the State Highway Administration since 1972. The earlier records were copied from plats in (State Road Plat Book) in series C2458 that also contains documents filed in paper form between 1972 and 1987. The records show the proposed routes of the roads and contain plat and contract numbers assigned by the highway administration. The records are arranged numerically by state plat number and were given book and page references. All plats prior to 1972 should be found in series C2458 and (Plat Book) in series C2442. Since October 1, 2002, the records are filed electronically with the Maryland State Archives as (State Road Plats) in series S1742. Scanning from aperture cards will be reserved for those plats not found in series C2458 or to fill in gaps or provide a clearer or more complete copy. Access available in electronic form derived from the records themselves.