Frederick County, MDOverview This feature service provides detailed geographic data representing the MARC Rail Lines, a commuter rail system serving the Baltimore-Washington metropolitan area. It is designed to support transportation planning, infrastructure management, and public transit analysis within this region. Feature Layers MARC Rail Lines : This layer depicts the physical rail lines of the MARC commuter system as linear features. It includes information on the names of rail segments and their lengths, useful for transportation network analysis and route planning. The geometry accurately reflects the rail corridors, enabling integration with other transit or infrastructure datasets. Geographic Coverage The dataset covers portions of the Baltimore-Washington area, focusing on rail infrastructure in the mid-Atlantic region of the United States. It supports understanding of regional transit connectivity and corridor management. Use Cases Transit network planning and optimization for the MARC commuter system. Infrastructure maintenance and asset management of rail corridors. Geospatial analysis of transit accessibility and service areas.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/6e59d2dfdf734f498f91ecbd9ff62328_1engFrederick County Open DataPublicMARC Rail Lines Transportation Network [Maryland--Frederick County]Web servicesMaryland--Frederick CountyMarylandLast Modified: 2026-03-09