 The whole of the East Cross Route was built and follows the A12 to Bow Road, then the A102 through the Blackwall Tunnel to the Sun in the Sands roundabout, and the A2 to Kidbrooke, meeting the South Cross Route.The South Cross Route ran beneath Blackheath Park in a tunnel, following railways as much as possible for its route though Peckham, Loughborough Park and Clapham to Nine Elms.There was then a link to the West Cross Route and Ringway 2 at Wandsworth.