Pennsylvania Avenue Line (Washington, D.C.) to take up such portions of their tracks as may come in way of the improvement of the Capitol Grounds". This improvement gave the Capitol Grounds their present shape, bounded by First Street West and East and B Street North and South, and the Pennsylvania Avenue Line was moved to First Street West and B Street South. The B&O station branch was moved to First Avenue West and C Street North, ending at New Jersey Avenue; this had been the route of the B&O before its tracks (actually those of the Alexandria and Washington Railroad) were ripped up in 1872.
Reading–Taunton line to Taunton line entirely. A few services from London travel only part way along the line, terminating at Westbury or Frome. GWR also provide local services along parts of the line, between Reading and Bedwyn, and between Westbury and Castle Cary. The route is double-track throughout, with passing loops at certain locations. The highest line-speed on the route is . The route has a loading gauge clearance of W7 except Reading to Westbury and Taunton to Exeter, which are the larger W8, and is open to rolling stock up to Route Availability 8. Signalling requires four minutes between trains on