 The only remaining railway activity is on the line connecting the junctions leading to the bridges, and the Tyneside IECC at the west of the site (near the King Edward VII bridge lines), which controls train movements on the East Coast Main Line between Northallerton and Morpeth.Most other TMDs in the area have also closed, mainly due to decreased goods and mineral traffic in the latter half of the 20th century.Only Heaton TMD and South Gosforth TMD (now used for maintaining the Tyne & Wear Metrocars) remain in operation, although the Tyne Yard at Lamesley retains some facilities for freight locomotives.