This interactive map displays North American railway networks, distinguishing major freight rail operators by color. The visualization uses the Leaflet library with Stamen watercolor background tiles, while railway line data is pulled from ArcGIS FeatureServer layers via esri-leaflet and esri-leaflet-vector. Individual rail companies, including BNSF, KCS, CN, CPR, NS, UP, and CSXT, are rendered as separately styled colored polylines, with blue for BNSF and green for KCS, demonstrating real-time loading of geospatial feature services.